diff --git a/BUILD.gn b/BUILD.gn
new file mode 100644
index 00000000000000..1ed186b597eece
--- /dev/null
+++ b/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+node_gn_build("node") {
+}
diff --git a/deps/ada/BUILD.gn b/deps/ada/BUILD.gn
new file mode 100644
index 00000000000000..e92ac3a3beac14
--- /dev/null
+++ b/deps/ada/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+ada_gn_build("ada") {
+}
diff --git a/deps/ada/unofficial.gni b/deps/ada/unofficial.gni
new file mode 100644
index 00000000000000..d3d14193c5a154
--- /dev/null
+++ b/deps/ada/unofficial.gni
@@ -0,0 +1,29 @@
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+import("../../node.gni")
+import("$node_v8_path/gni/v8.gni")
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("ada_gn_build") {
+  config("ada_config") {
+    include_dirs = [ "." ]
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("ada.gyp") ],
+                            "scope",
+                            [ "ada.gyp" ])
+
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+    public_configs = [ ":ada_config" ]
+    sources = gypi_values.ada_sources
+  }
+}
diff --git a/deps/base64/BUILD.gn b/deps/base64/BUILD.gn
new file mode 100644
index 00000000000000..172dd960910439
--- /dev/null
+++ b/deps/base64/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+base64_gn_build("base64") {
+}
diff --git a/deps/base64/unofficial.gni b/deps/base64/unofficial.gni
new file mode 100644
index 00000000000000..8138d88798e1df
--- /dev/null
+++ b/deps/base64/unofficial.gni
@@ -0,0 +1,141 @@
+# Copyright (c) 2013-2022 GitHub Inc.
+# Copyright 2022 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("base64_gn_build") {
+  config("base64_external_config") {
+    include_dirs = [ "base64/include" ]
+    if (!is_component_build) {
+      defines = [ "BASE64_STATIC_DEFINE" ]
+    }
+  }
+
+  config("base64_internal_config") {
+    include_dirs = [ "base64/lib" ]
+    if (is_component_build) {
+      defines = [ "BASE64_EXPORTS" ]
+    } else {
+      defines = []
+    }
+    if (target_cpu == "x86" || target_cpu == "x64") {
+      defines += [
+        "HAVE_SSSE3=1",
+        "HAVE_SSE41=1",
+        "HAVE_SSE42=1",
+        "HAVE_AVX=1",
+        "HAVE_AVX2=1",
+      ]
+    }
+    if (target_cpu == "arm") {
+      defines += [ "HAVE_NEON32=1" ]
+    }
+    if (target_cpu == "arm64") {
+      defines += [ "HAVE_NEON64=1" ]
+    }
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-implicit-fallthrough",
+        "-Wno-shadow",
+        "-Wno-unused-but-set-variable",
+      ]
+    }
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("base64.gyp") ],
+                            "scope",
+                            [ "base64.gyp" ])
+
+  component(target_name) {
+    forward_variables_from(invoker, "*")
+    configs += [ ":base64_internal_config" ]
+    public_configs = [ ":base64_external_config" ]
+    sources = gypi_values.base64_sources_common
+    deps = [
+      ":base64_ssse3",
+      ":base64_sse41",
+      ":base64_sse42",
+      ":base64_avx",
+      ":base64_avx2",
+      ":base64_neon32",
+      ":base64_neon64",
+    ]
+  }
+
+  source_set("base64_ssse3") {
+    configs += [ ":base64_internal_config" ]
+    sources = [ "base64/lib/arch/ssse3/codec.c" ]
+    if (target_cpu == "x86" || target_cpu == "x64") {
+      if (is_clang || !is_win) {
+        cflags_c = [ "-mssse3" ]
+      }
+    }
+  }
+
+  source_set("base64_sse41") {
+    configs += [ ":base64_internal_config" ]
+    sources = [ "base64/lib/arch/sse41/codec.c" ]
+    if (target_cpu == "x86" || target_cpu == "x64") {
+      if (is_clang || !is_win) {
+        cflags_c = [ "-msse4.1" ]
+      }
+    }
+  }
+
+  source_set("base64_sse42") {
+    configs += [ ":base64_internal_config" ]
+    sources = [ "base64/lib/arch/sse42/codec.c" ]
+    if (target_cpu == "x86" || target_cpu == "x64") {
+      if (is_clang || !is_win) {
+        cflags_c = [ "-msse4.2" ]
+      }
+    }
+  }
+
+  source_set("base64_avx") {
+    configs += [ ":base64_internal_config" ]
+    sources = [ "base64/lib/arch/avx/codec.c" ]
+    if (target_cpu == "x86" || target_cpu == "x64") {
+      if (is_clang || !is_win) {
+        cflags_c = [ "-mavx" ]
+      } else if (is_win) {
+        cflags_c = [ "/arch:AVX" ]
+      }
+    }
+  }
+  source_set("base64_avx2") {
+    configs += [ ":base64_internal_config" ]
+    sources = [ "base64/lib/arch/avx2/codec.c" ]
+    if (target_cpu == "x86" || target_cpu == "x64") {
+      if (is_clang || !is_win) {
+        cflags_c = [ "-mavx2" ]
+      } else if (is_win) {
+        cflags_c = [ "/arch:AVX2" ]
+      }
+    }
+  }
+
+  source_set("base64_neon32") {
+    configs += [ ":base64_internal_config" ]
+    sources = [ "base64/lib/arch/neon32/codec.c" ]
+    if (target_cpu == "arm") {
+      if (is_clang || !is_win) {
+        cflags_c = [ "-mfpu=neon" ]
+      }
+    }
+  }
+
+  source_set("base64_neon64") {
+    configs += [ ":base64_internal_config" ]
+    sources = [ "base64/lib/arch/neon64/codec.c" ]
+    # NEON is required in arm64, so no -mfpu flag is needed
+  }
+}
diff --git a/deps/brotli/BUILD.gn b/deps/brotli/BUILD.gn
new file mode 100644
index 00000000000000..8bdf8ce74d9789
--- /dev/null
+++ b/deps/brotli/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+brotli_gn_build("brotli") {
+}
diff --git a/deps/brotli/unofficial.gni b/deps/brotli/unofficial.gni
new file mode 100644
index 00000000000000..ce1df0d14cc01b
--- /dev/null
+++ b/deps/brotli/unofficial.gni
@@ -0,0 +1,45 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("brotli_gn_build") {
+  config("brotli_config") {
+    include_dirs = [ "c/include" ]
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("brotli.gyp") ],
+                            "scope",
+                            [ "brotli.gyp" ])
+
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+    public_configs = [ ":brotli_config" ]
+    sources = gypi_values.brotli_sources
+    if (is_linux) {
+      defines = [ "OS_LINUX" ]
+    } else if (is_mac) {
+      defines = [ "OS_MACOSX" ]
+    } else if (target_os == "freebsd") {
+      defines = [ "OS_FREEBSD" ]
+    }
+    if (!is_win) {
+      libs = [ "m" ]
+    }
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-implicit-fallthrough",
+        "-Wno-unreachable-code",
+        "-Wno-unreachable-code-return",
+      ]
+    }
+  }
+}
diff --git a/deps/cares/BUILD.gn b/deps/cares/BUILD.gn
new file mode 100644
index 00000000000000..ac19ac73ed1e24
--- /dev/null
+++ b/deps/cares/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+cares_gn_build("cares") {
+}
diff --git a/deps/cares/unofficial.gni b/deps/cares/unofficial.gni
new file mode 100644
index 00000000000000..07e2ed65b36deb
--- /dev/null
+++ b/deps/cares/unofficial.gni
@@ -0,0 +1,81 @@
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("cares_gn_build") {
+  config("cares_config") {
+    include_dirs = [ "include" ]
+    if (!is_component_build) {
+      defines = [ "CARES_STATICLIB" ]
+    }
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("cares.gyp") ],
+                            "scope",
+                            [ "cares.gyp" ])
+
+  component(target_name) {
+    forward_variables_from(invoker, "*")
+    public_configs = [ ":cares_config" ]
+    if (is_component_build) {
+      defines = [ "CARES_BUILDING_LIBRARY" ]
+    } else {
+      defines = []
+    }
+    if (is_win) {
+      defines += [ "CARES_PULL_WS2TCPIP_H=1" ]
+    }
+    if (is_posix) {
+      defines += [
+        "_DARWIN_USE_64_BIT_INODE=1",
+        "_LARGEFILE_SOURCE",
+        "_FILE_OFFSET_BITS=64",
+        "_GNU_SOURCE",
+        "HAVE_CONFIG_H",
+      ]
+    }
+
+    include_dirs = [ "src/lib" ]
+    if (is_win) {
+      include_dirs += [ "config/win32" ]
+    } else if (is_linux) {
+      include_dirs += [ "config/linux" ]
+    } else if (is_mac) {
+      include_dirs += [ "config/darwin" ]
+    }
+
+    if (is_win) {
+      libs = [
+        "ws2_32.lib",
+        "iphlpapi.lib",
+      ]
+    }
+
+    sources = gypi_values.cares_sources_common
+    if (is_win) {
+      sources += gypi_values.cares_sources_win
+    }
+    if (is_linux) {
+      sources += [ "config/linux/ares_config.h" ]
+    }
+    if (is_mac) {
+      sources += [ "config/darwin/ares_config.h" ]
+    }
+
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-implicit-fallthrough",
+        "-Wno-unreachable-code",
+      ]
+    }
+  }
+}
diff --git a/deps/googletest/BUILD.gn b/deps/googletest/BUILD.gn
new file mode 100644
index 00000000000000..de13f3f653b5d5
--- /dev/null
+++ b/deps/googletest/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+googletest_gn_build("googletest") {
+}
diff --git a/deps/googletest/unofficial.gni b/deps/googletest/unofficial.gni
new file mode 100644
index 00000000000000..e262d1bc1829a1
--- /dev/null
+++ b/deps/googletest/unofficial.gni
@@ -0,0 +1,41 @@
+# Copyright 2021 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("googletest_gn_build") {
+  config("googletest_config") {
+    include_dirs = [ "include" ]
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("googletest.gyp") ],
+                            "scope",
+                            [ "googletest.gyp" ])
+
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+    testonly = true
+    include_dirs = [
+      "include",
+      ".",
+    ]
+    defines = [
+      "GTEST_HAS_POSIX_RE=0",
+      "GTEST_LANG_CXX11=1",
+    ]
+    sources = gypi_values.googletest_sources
+  }
+
+  source_set("gtest_main") {
+    testonly = true
+    deps = [ ":googletest" ]
+    sources = [ "src/gtest_main.cc" ]
+    public_configs = [ ":googletest_config" ]
+  }
+}
diff --git a/deps/histogram/BUILD.gn b/deps/histogram/BUILD.gn
new file mode 100644
index 00000000000000..e2f3ee37137a6b
--- /dev/null
+++ b/deps/histogram/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+histogram_gn_build("histogram") {
+}
diff --git a/deps/histogram/unofficial.gni b/deps/histogram/unofficial.gni
new file mode 100644
index 00000000000000..eedb62049097d7
--- /dev/null
+++ b/deps/histogram/unofficial.gni
@@ -0,0 +1,38 @@
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("histogram_gn_build") {
+  config("histogram_config") {
+    include_dirs = [ "include" ]
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("histogram.gyp") ],
+                            "scope",
+                            [ "histogram.gyp" ])
+
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+    public_configs = [ ":histogram_config" ]
+    sources = gypi_values.histogram_sources
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-atomic-alignment",
+        "-Wno-incompatible-pointer-types",
+        "-Wno-unused-function",
+      ]
+    }
+    if (is_linux) {
+      libs = [ "atomic" ]
+    }
+  }
+}
diff --git a/deps/llhttp/BUILD.gn b/deps/llhttp/BUILD.gn
new file mode 100644
index 00000000000000..64a2a4799d5530
--- /dev/null
+++ b/deps/llhttp/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+llhttp_gn_build("llhttp") {
+}
diff --git a/deps/llhttp/unofficial.gni b/deps/llhttp/unofficial.gni
new file mode 100644
index 00000000000000..80e360d472610c
--- /dev/null
+++ b/deps/llhttp/unofficial.gni
@@ -0,0 +1,34 @@
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("llhttp_gn_build") {
+  config("llhttp_config") {
+    include_dirs = [ "include" ]
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("llhttp.gyp") ],
+                            "scope",
+                            [ "llhttp.gyp" ])
+
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+    public_configs = [ ":llhttp_config" ]
+    include_dirs = [ "include" ]
+    sources = gypi_values.llhttp_sources
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-implicit-fallthrough",
+        "-Wno-unreachable-code",
+      ]
+    }
+  }
+}
diff --git a/deps/nghttp2/BUILD.gn b/deps/nghttp2/BUILD.gn
new file mode 100644
index 00000000000000..274352b0e2449f
--- /dev/null
+++ b/deps/nghttp2/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+nghttp2_gn_build("nghttp2") {
+}
diff --git a/deps/nghttp2/unofficial.gni b/deps/nghttp2/unofficial.gni
new file mode 100644
index 00000000000000..0d84500a66f249
--- /dev/null
+++ b/deps/nghttp2/unofficial.gni
@@ -0,0 +1,45 @@
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("nghttp2_gn_build") {
+  config("nghttp2_config") {
+    include_dirs = [ "lib/includes" ]
+    if (!is_component_build) {
+      defines = [ "NGHTTP2_STATICLIB" ]
+    }
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("nghttp2.gyp") ],
+                            "scope",
+                            [ "nghttp2.gyp" ])
+
+  component(target_name) {
+    forward_variables_from(invoker, "*")
+
+    public_configs = [ ":nghttp2_config" ]
+    defines = [
+      "_U_",
+      "HAVE_CONFIG_H"
+    ]
+    if (is_component_build) {
+      defines += [ "BUILDING_NGHTTP2" ]
+    }
+
+    sources = gypi_values.nghttp2_sources
+
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-implicit-fallthrough",
+      ]
+    }
+  }
+}
diff --git a/deps/ngtcp2/BUILD.gn b/deps/ngtcp2/BUILD.gn
new file mode 100644
index 00000000000000..41df46fea419d3
--- /dev/null
+++ b/deps/ngtcp2/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+ngtcp2_gn_build("ngtcp2") {
+}
diff --git a/deps/ngtcp2/unofficial.gni b/deps/ngtcp2/unofficial.gni
new file mode 100644
index 00000000000000..a304cf4aded42d
--- /dev/null
+++ b/deps/ngtcp2/unofficial.gni
@@ -0,0 +1,74 @@
+# Copyright (c) 2013-2021 GitHub Inc.
+# Copyright 2021 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+import("//node/node.gni")
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("ngtcp2_gn_build") {
+  config("ngtcp2_config") {
+    include_dirs = [
+      "nghttp3/lib/",
+      "nghttp3/lib/includes/",
+      "ngtcp2/crypto/includes/",
+      "ngtcp2/lib/includes/",
+    ]
+    defines = [
+      "NGTCP2_STATICLIB",
+      "NGHTTP3_STATICLIB",
+    ]
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("ngtcp2.gyp") ],
+                            "scope",
+                            [ "ngtcp2.gyp" ])
+
+  # FIXME(zcbenz): Some APIs of ngtcp2 are not marked as export, so can not turn
+  # into component. This should be fixed in upstream ngtcp2
+  static_library(target_name) {
+    forward_variables_from(invoker, "*")
+    public_configs = [ ":ngtcp2_config" ]
+
+    defines = [ "_U_" ]
+    if (is_win) {
+      defines += [
+        "WIN32",
+        "_WINDOWS",
+        "HAVE_CONFIG_H",
+      ]
+    }
+    if (is_linux) {
+      defines += [
+        "HAVE_ARPA_INET_H",
+        "HAVE_NETINET_IN_H",
+      ]
+    }
+
+    include_dirs = [
+      ".",
+      "ngtcp2/lib/",
+      "ngtcp2/crypto/",
+      "nghttp3/lib/"
+    ]
+
+    sources = gypi_values.nghttp3_sources + gypi_values.ngtcp2_sources
+    if (node_use_openssl) {
+      sources += gypi_values.ngtcp2_sources_openssl
+      deps = [ "../openssl" ]
+    }
+
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-extra-semi",
+        "-Wno-implicit-fallthrough",
+      ]
+    }
+  }
+}
diff --git a/deps/openssl/BUILD.gn b/deps/openssl/BUILD.gn
new file mode 100644
index 00000000000000..7d2db10a84c6c4
--- /dev/null
+++ b/deps/openssl/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+openssl_gn_build("openssl") {
+}
diff --git a/deps/openssl/unofficial.gni b/deps/openssl/unofficial.gni
new file mode 100644
index 00000000000000..9b94ccb275e7bc
--- /dev/null
+++ b/deps/openssl/unofficial.gni
@@ -0,0 +1,151 @@
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+declare_args() {
+  # Do not build optimized assembly for OpenSSL
+  # FIXME(zcbenz): asm code does not compile with clang.
+  openssl_no_asm = true
+}
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("openssl_gn_build") {
+  config("openssl_external_config") {
+    include_dirs = [
+      "openssl/crypto/include",
+      "openssl/include",
+    ]
+  }
+
+  config("openssl_internal_config") {
+    gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                              [ rebase_path("openssl.gypi") ],
+                              "scope",
+                              [ "openssl.gypi" ])
+
+    defines = [
+      "MODULESDIR=\"deps/openssl/lib/openssl-modules\"",
+      "OPENSSL_API_COMPAT=0x10100001L",
+      "STATIC_LEGACY",
+    ] + gypi_values.openssl_default_defines_all
+    if (is_win) {
+      defines += [
+        ## default of Win. See INSTALL in openssl repo.
+        "OPENSSLDIR=\"C:\\\Program\ Files\\\Common\ Files\\\SSL\"",
+        "ENGINESDIR=\"NUL\"",
+        "OPENSSL_SYS_WIN32", "WIN32_LEAN_AND_MEAN", "L_ENDIAN",
+        "_CRT_SECURE_NO_DEPRECATE", "UNICODE", "_UNICODE",
+      ]
+    } else if (is_mac) {
+      defines += [
+        "OPENSSLDIR=\"/System/Library/OpenSSL/\"",
+        "ENGINESDIR=\"/dev/null\"",
+      ]
+    } else {
+      defines += [
+        "OPENSSLDIR=\"/etc/ssl\"",
+        "ENGINESDIR=\"/dev/null\"",
+        "TERMIOS",
+      ]
+    }
+
+    if (is_posix) {
+      asmflags = [ "-fPIC" ]
+      cflags = [ "-fPIC" ]
+      ldflags = [ "-fPIC" ]
+    }
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-atomic-alignment",
+        "-Wno-constant-conversion",
+        "-Wno-implicit-fallthrough",
+        "-Wno-implicit-function-declaration",
+        "-Wno-sign-compare",
+        "-Wno-unknown-escape-sequence",
+        "-Wno-unreachable-code",
+        "-Wno-unreachable-code-break",
+        "-Wno-unreachable-code-return",
+        "-Wno-unused-function",
+      ]
+    }
+    if (is_win) {
+      libs = [ "crypt32.lib" ]
+    } else if (is_linux) {
+      libs = [ "atomic" ]
+    }
+
+    common_gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                                     [ rebase_path("openssl_common.gypi") ],
+                                     "scope",
+                                     [ "openssl_common.gypi" ])
+    include_dirs = common_gypi_values.include_dirs
+  }
+
+  static_library(target_name) {
+    forward_variables_from(invoker, "*")
+
+    configs += [ ":openssl_internal_config" ]
+    public_configs = [ ":openssl_external_config" ]
+
+    config_path_name = ""
+    if (is_win) {
+      if (target_cpu == "x86") {
+        config_path_name = "VC-WIN32"
+      } else if (target_cpu == "x64") {
+        config_path_name = "VC-WIN64A"
+      } else if (target_cpu == "arm64") {
+        config_path_name = "VC-WIN64-ARM"
+      }
+    } else if (is_linux) {
+      if (target_cpu == "x86") {
+        config_path_name = "linux-elf"
+      } else if (target_cpu == "x64") {
+        config_path_name = "linux-x86_64"
+      } else if (target_cpu == "arm") {
+        config_path_name = "linux-armv4"
+      } else if (target_cpu == "arm64") {
+        config_path_name = "linux-aarch64"
+      }
+    } else if (is_apple) {
+      if (target_cpu == "x86") {
+        config_path_name = "darwin-i386-cc"
+      } else if (target_cpu == "x64") {
+        config_path_name = "darwin64-x86_64-cc"
+      } else if (target_cpu == "arm64") {
+        config_path_name = "darwin64-arm64-cc"
+      }
+    }
+    assert(config_path_name != "", "Unsupported platform")
+
+    # GN variables can not have - in name.
+    config_name = string_replace(config_path_name, "-", "_")
+
+    if (openssl_no_asm) {
+      asm_name = "no-asm"
+    } else {
+      # TODO(zcbenz): Check gas_version and nasm_version.
+      asm_name = "asm_avx2"
+    }
+    if (is_win && target_cpu == "arm64") {
+      asm_name = "no-asm"
+    }
+    config_path = "config/archs/" + config_path_name + "/" + asm_name
+
+    gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                              [ rebase_path(config_path + "/openssl.gypi"), ],
+                              "scope",
+                              [ config_path + "/openssl.gypi" ])
+
+    include_dirs = rebase_path(gypi_values.include_dirs, ".", config_path)
+    defines = gypi_values["openssl_defines_" + config_name]
+    sources = filter_exclude(gypi_values.openssl_sources +
+                             gypi_values["openssl_sources_" + config_name],
+                             [ "*.ld" ])
+  }
+}
diff --git a/deps/postject/BUILD.gn b/deps/postject/BUILD.gn
new file mode 100644
index 00000000000000..895b5bfc5b3a1a
--- /dev/null
+++ b/deps/postject/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+postject_gn_build("postject") {
+}
diff --git a/deps/postject/unofficial.gni b/deps/postject/unofficial.gni
new file mode 100644
index 00000000000000..6a4d2ddb36e782
--- /dev/null
+++ b/deps/postject/unofficial.gni
@@ -0,0 +1,21 @@
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("postject_gn_build") {
+  config("postject_config") {
+    include_dirs = [ "." ]
+  }
+
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+    public_configs = [ ":postject_config" ]
+    sources = [ "postject-api.h" ]
+  }
+}
diff --git a/deps/simdutf/BUILD.gn b/deps/simdutf/BUILD.gn
new file mode 100644
index 00000000000000..119d49456911e9
--- /dev/null
+++ b/deps/simdutf/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+simdutf_gn_build("simdutf") {
+}
diff --git a/deps/simdutf/unofficial.gni b/deps/simdutf/unofficial.gni
new file mode 100644
index 00000000000000..d623de36312e3e
--- /dev/null
+++ b/deps/simdutf/unofficial.gni
@@ -0,0 +1,37 @@
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("simdutf_gn_build") {
+  config("simdutf_config") {
+    include_dirs = [ "." ]
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("simdutf.gyp") ],
+                            "scope",
+                            [ "simdutf.gyp" ])
+
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+    public_configs = [ ":simdutf_config" ]
+    sources = gypi_values.simdutf_sources
+    if (is_clang || !is_win) {
+      cflags_cc = [
+        "-Wno-#pragma-messages",
+        "-Wno-ambiguous-reversed-operator",
+        "-Wno-unreachable-code-break",
+        "-Wno-unused-const-variable",
+        "-Wno-unused-function",
+        "-Wno-c++98-compat-extra-semi",
+      ]
+    }
+  }
+}
diff --git a/deps/uv/BUILD.gn b/deps/uv/BUILD.gn
new file mode 100644
index 00000000000000..8e6ac27048b596
--- /dev/null
+++ b/deps/uv/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+uv_gn_build("uv") {
+}
diff --git a/deps/uv/unofficial.gni b/deps/uv/unofficial.gni
new file mode 100644
index 00000000000000..64d6bcbc5c13da
--- /dev/null
+++ b/deps/uv/unofficial.gni
@@ -0,0 +1,110 @@
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("uv_gn_build") {
+  config("uv_external_config") {
+    include_dirs = [ "include" ]
+  }
+
+  config("uv_internal_config") {
+    include_dirs = [
+      "include",
+      "src",
+    ]
+
+    defines = [ "BUILDING_UV_SHARED" ]  # always export symbols
+    if (is_posix) {
+      defines += [
+        "_LARGEFILE_SOURCE",
+        "_FILE_OFFSET_BITS=64",
+      ]
+    }
+    if (is_linux) {
+      defines += [
+        "_POSIX_C_SOURCE=200112",
+        "_GNU_SOURCE",
+      ]
+    }
+    if (is_apple) {
+      defines += [
+        "_DARWIN_USE_64_BIT_INODE=1",
+        "_DARWIN_UNLIMITED_SELECT=1",
+      ]
+    }
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-deprecated-declarations",
+        "-Wno-extra-semi",
+        "-Wno-implicit-fallthrough",
+        "-Wno-missing-braces",
+        "-Wno-string-conversion",
+        "-Wno-shadow",
+        "-Wno-unreachable-code",
+        "-Wno-unreachable-code-return",
+        "-Wno-unused-but-set-variable",
+        "-Wno-unused-function",
+        "-Wno-unused-result",
+        "-Wno-unused-variable",
+      ]
+    }
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("uv.gyp") ],
+                            "scope",
+                            [ "uv.gyp" ])
+
+  component(target_name) {
+    forward_variables_from(invoker, "*")
+
+    configs += [ ":uv_internal_config" ]
+    public_configs = [ ":uv_external_config" ]
+
+    if (is_win) {
+      libs = [
+        "advapi32.lib",
+        "iphlpapi.lib",
+        "psapi.lib",
+        "shell32.lib",
+        "user32.lib",
+        "userenv.lib",
+        "ws2_32.lib",
+      ]
+    }
+    if (is_posix) {
+      libs = [ "m" ]
+      ldflags = [ "-pthread" ]
+    }
+    if (is_linux) {
+      libs += [
+        "dl",
+        "rt",
+      ]
+    }
+
+    sources = gypi_values.uv_sources_common
+    if (is_win) {
+      sources += gypi_values.uv_sources_win
+    }
+    if (is_posix) {
+      sources += gypi_values.uv_sources_posix +
+                 [ "src/unix/proctitle.c" ]
+    }
+    if (is_linux) {
+      sources += gypi_values.uv_sources_linux
+    }
+    if (is_apple) {
+      sources += gypi_values.uv_sources_apple +
+                 gypi_values.uv_sources_bsd_common
+    }
+  }
+}
diff --git a/deps/uvwasi/BUILD.gn b/deps/uvwasi/BUILD.gn
new file mode 100644
index 00000000000000..4f8fb081df805a
--- /dev/null
+++ b/deps/uvwasi/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+uvwasi_gn_build("uvwasi") {
+}
diff --git a/deps/uvwasi/unofficial.gni b/deps/uvwasi/unofficial.gni
new file mode 100644
index 00000000000000..17f4c8e6eed0b3
--- /dev/null
+++ b/deps/uvwasi/unofficial.gni
@@ -0,0 +1,38 @@
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please edit the gyp files if you are making changes to build system.
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("uvwasi_gn_build") {
+  config("uvwasi_config") {
+    include_dirs = [ "include" ]
+  }
+
+  gypi_values = exec_script("../../tools/gypi_to_gn.py",
+                            [ rebase_path("uvwasi.gyp") ],
+                            "scope",
+                            [ "uvwasi.gyp" ])
+
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+
+    public_configs = [ ":uvwasi_config" ]
+    sources = gypi_values.uvwasi_sources
+    include_dirs = [ "src" ]
+    deps = [ "../uv" ]
+
+    if (is_clang || !is_win) {
+      cflags_c = [
+        "-Wno-extra-semi",
+        "-Wno-shadow",
+      ]
+    }
+  }
+}
diff --git a/node.gni b/node.gni
new file mode 100644
index 00000000000000..2be97a17a2f710
--- /dev/null
+++ b/node.gni
@@ -0,0 +1,67 @@
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please take a look at node.gyp if you are making changes to build system.
+
+# Embedder options.
+declare_args() {
+  # The location of Node.js in source code tree.
+  node_path = "//node"
+
+  # The location of V8, use the one from node's deps by default.
+  node_v8_path = "$node_path/deps/v8"
+
+  # The NODE_MODULE_VERSION defined in node_version.h.
+  node_module_version = exec_script("$node_path/tools/getmoduleversion.py", [], "value")
+
+  # Support for external shareable builtins.
+  # TODO(zcbenz): This is currently copied from configure.py, we should share
+  # the list between configure.py and GN configurations.
+  node_builtin_shareable_builtins = [
+    "deps/cjs-module-lexer/lexer.js",
+    "deps/cjs-module-lexer/dist/lexer.js",
+    "deps/undici/undici.js",
+  ]
+}
+
+# Equivalent of gyp file's configurations.
+declare_args() {
+  # Enable the V8 inspector protocol for use with node.
+  node_enable_inspector = true
+
+  # Build node with SSL support.
+  # The variable is called "openssl" for parity with node's GYP build.
+  node_use_openssl = true
+
+  # Use the specified path to system CA (PEM format) in addition to
+  # the BoringSSL supplied CA store or compiled-in Mozilla CA copy.
+  node_openssl_system_ca_path = ""
+
+  # Initialize v8 platform during node.js startup.
+  node_use_v8_platform = true
+
+  # Custom build tag.
+  node_tag = ""
+
+  # V8 options to pass, see `node --v8-options` for examples.
+  node_v8_options = ""
+
+  # Provide a custom URL prefix for the `process.release` properties
+  # `sourceUrl` and `headersUrl`. When compiling a release build, this will
+  # default to https://nodejs.org/download/release/').
+  node_release_urlbase = ""
+
+  # Use code cache to speed up startup. Disabled for cross compilation.
+  node_use_node_code_cache = host_os == target_os && host_cpu == target_cpu
+
+  # Use snapshot to speed up startup.
+  # TODO(zcbenz): node_mksnapshot is not ready for cross-os compilation.
+  node_use_node_snapshot = host_os == target_os
+}
+
+assert(!node_enable_inspector || node_use_openssl,
+       "node_enable_inspector requires node_use_openssl")
diff --git a/src/inspector/BUILD.gn b/src/inspector/BUILD.gn
new file mode 100644
index 00000000000000..909fd14345fcd9
--- /dev/null
+++ b/src/inspector/BUILD.gn
@@ -0,0 +1,14 @@
+##############################################################################
+#                                                                            #
+#                       DO NOT EDIT THIS FILE!                               #
+#                                                                            #
+##############################################################################
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please modify the gyp files if you are making changes to build system.
+
+import("unofficial.gni")
+
+inspector_gn_build("inspector") {
+}
diff --git a/src/inspector/unofficial.gni b/src/inspector/unofficial.gni
new file mode 100644
index 00000000000000..b562109e94c17d
--- /dev/null
+++ b/src/inspector/unofficial.gni
@@ -0,0 +1,81 @@
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("../../node.gni")
+import("$node_v8_path/gni/v8.gni")
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("inspector_gn_build") {
+  group(target_name) {
+    forward_variables_from(invoker, "*")
+    deps = [
+      ":node_protocol_generated_sources",
+      ":v8_inspector_compress_protocol_json",
+    ]
+  }
+
+  node_gen_dir = get_label_info("../..", "target_gen_dir")
+  protocol_tool_path = "../../tools/inspector_protocol"
+
+  gypi_values = exec_script(
+      "../../tools/gypi_to_gn.py",
+      [ rebase_path("node_inspector.gypi"),
+        "--replace=<(SHARED_INTERMEDIATE_DIR)=$node_gen_dir",
+        "--replace=<(protocol_tool_path)=$protocol_tool_path" ],
+      "scope",
+      [ "node_inspector.gypi" ])
+
+  action("node_protocol_generated_sources") {
+    script = "$protocol_tool_path/code_generator.py"
+
+    deps = [ ":node_protocol_json" ]
+
+    outputs = gypi_values.node_inspector_generated_sources
+    inputs = gypi_values.node_protocol_files + [
+      "node_protocol_config.json",
+      "$node_gen_dir/src/node_protocol.json",
+    ]
+
+    args = [
+      "--jinja_dir",
+      # jinja is in third_party.
+      rebase_path("//third_party/", root_build_dir),
+      "--output_base",
+      rebase_path("$node_gen_dir/src", root_build_dir),
+      "--config",
+      rebase_path("node_protocol_config.json", root_build_dir),
+    ]
+  }
+
+  action("v8_inspector_compress_protocol_json") {
+    script = "../../tools/compress_json.py"
+    deps = [ ":concatenate_protocols" ]
+    inputs = [ "$target_gen_dir/concatenated_protocol.json" ]
+    outputs = [ "$target_gen_dir/v8_inspector_protocol_json.h" ]
+    args = rebase_path(inputs + outputs, root_build_dir)
+  }
+
+  action("concatenate_protocols") {
+    script = "$protocol_tool_path/concatenate_protocols.py"
+    deps = [ ":node_protocol_json" ]
+    inputs = [
+      "$node_gen_dir/src/js_protocol.json",
+      "$node_gen_dir/src/node_protocol.json",
+    ]
+    outputs = [
+      "$target_gen_dir/concatenated_protocol.json",
+    ]
+    args = rebase_path(inputs + outputs, root_build_dir)
+  }
+
+  action_foreach("node_protocol_json") {
+    script = "$node_v8_path/third_party/inspector_protocol/convert_protocol_to_json.py"
+    sources = [ "node_protocol.pdl", v8_inspector_js_protocol ]
+    outputs = [ "$node_gen_dir/src/{{source_name_part}}.json" ]
+    args = [ "{{source}}" ] + rebase_path(outputs, root_build_dir)
+  }
+}
diff --git a/tools/generate_config_gypi.py b/tools/generate_config_gypi.py
new file mode 100755
index 00000000000000..26cc5f04201fec
--- /dev/null
+++ b/tools/generate_config_gypi.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This script reads the configurations of GN and outputs a config.gypi file that
+# will be used to populate process.config.variables.
+
+import re
+import os
+import subprocess
+import sys
+
+root_dir = os.path.dirname(os.path.dirname(__file__))
+sys.path.append(os.path.join(root_dir, 'node', 'tools'))
+import getmoduleversion
+import getnapibuildversion
+
+GN_RE = re.compile(r'(\w+)\s+=\s+(.*?)$', re.MULTILINE)
+
+def bool_string_to_number(v):
+  return 1 if v == 'true' else 0
+
+def translate_config(config):
+  return {
+    'target_defaults': {
+      'default_configuration':
+          'Debug' if config['is_debug'] == 'true' else 'Release',
+    },
+    'variables': {
+      'asan': bool_string_to_number(config['is_asan']),
+      'llvm_version': 13,
+      'napi_build_version': config['napi_build_version'],
+      'node_builtin_shareable_builtins':
+          eval(config['node_builtin_shareable_builtins']),
+      'node_module_version': int(config['node_module_version']),
+      'node_shared': bool_string_to_number(config['is_component_build']),
+      'node_use_openssl': config['node_use_openssl'],
+      'node_use_node_code_cache': config['node_use_node_code_cache'],
+      'node_use_node_snapshot': config['node_use_node_snapshot'],
+      'v8_enable_31bit_smis_on_64bit_arch':
+          bool_string_to_number(config['v8_enable_31bit_smis_on_64bit_arch']),
+      'v8_enable_pointer_compression':
+          bool_string_to_number(config['v8_enable_pointer_compression']),
+      'v8_enable_i18n_support':
+          bool_string_to_number(config['v8_enable_i18n_support']),
+      'v8_enable_inspector':  # this is actually a node misnomer
+          bool_string_to_number(config['node_enable_inspector']),
+      'shlib_suffix': 'dylib' if sys.platform == 'darwin' else 'so',
+    }
+  }
+
+def main(gn_out_dir, output_file, depfile):
+  # Get GN config and parse into a dictionary.
+  if sys.platform == 'win32':
+    gn = 'gn.exe'
+  else:
+    gn = 'gn'
+  gnconfig = subprocess.check_output(
+                 [gn, 'args', '--list', '--short', '-C', gn_out_dir])
+  config = dict(re.findall(GN_RE, gnconfig.decode('utf-8')))
+  config['node_module_version'] = getmoduleversion.get_version()
+  config['napi_build_version'] = getnapibuildversion.get_napi_version()
+
+  # Write output.
+  with open(output_file, 'w') as f:
+    f.write(repr(translate_config(config)))
+
+  # Write depfile. Force regenerating config.gypi when GN configs change.
+  with open(depfile, 'w') as f:
+    f.write('%s: %s '%(output_file, 'build.ninja'))
+
+if __name__ == '__main__':
+  main(sys.argv[1], sys.argv[2], sys.argv[3])
diff --git a/tools/gypi_to_gn.py b/tools/gypi_to_gn.py
new file mode 100755
index 00000000000000..47182d8017bfc2
--- /dev/null
+++ b/tools/gypi_to_gn.py
@@ -0,0 +1,219 @@
+#!/usr/bin/env python3
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+# Deleted from Chromium in https://crrev.com/097f64c631.
+
+"""Converts a given gypi file to a python scope and writes the result to stdout.
+USING THIS SCRIPT IN CHROMIUM
+Forking Python to run this script in the middle of GN is slow, especially on
+Windows, and it makes both the GYP and GN files harder to follow. You can't
+use "git grep" to find files in the GN build any more, and tracking everything
+in GYP down requires a level of indirection. Any calls will have to be removed
+and cleaned up once the GYP-to-GN transition is complete.
+As a result, we only use this script when the list of files is large and
+frequently-changing. In these cases, having one canonical list outweights the
+downsides.
+As of this writing, the GN build is basically complete. It's likely that all
+large and frequently changing targets where this is appropriate use this
+mechanism already. And since we hope to turn down the GYP build soon, the time
+horizon is also relatively short. As a result, it is likely that no additional
+uses of this script should every be added to the build. During this later part
+of the transition period, we should be focusing more and more on the absolute
+readability of the GN build.
+HOW TO USE
+It is assumed that the file contains a toplevel dictionary, and this script
+will return that dictionary as a GN "scope" (see example below). This script
+does not know anything about GYP and it will not expand variables or execute
+conditions.
+It will strip conditions blocks.
+A variables block at the top level will be flattened so that the variables
+appear in the root dictionary. This way they can be returned to the GN code.
+Say your_file.gypi looked like this:
+  {
+     'sources': [ 'a.cc', 'b.cc' ],
+     'defines': [ 'ENABLE_DOOM_MELON' ],
+  }
+You would call it like this:
+  gypi_values = exec_script("//build/gypi_to_gn.py",
+                            [ rebase_path("your_file.gypi") ],
+                            "scope",
+                            [ "your_file.gypi" ])
+Notes:
+ - The rebase_path call converts the gypi file from being relative to the
+   current build file to being system absolute for calling the script, which
+   will have a different current directory than this file.
+ - The "scope" parameter tells GN to interpret the result as a series of GN
+   variable assignments.
+ - The last file argument to exec_script tells GN that the given file is a
+   dependency of the build so Ninja can automatically re-run GN if the file
+   changes.
+Read the values into a target like this:
+  component("mycomponent") {
+    sources = gypi_values.sources
+    defines = gypi_values.defines
+  }
+Sometimes your .gypi file will include paths relative to a different
+directory than the current .gn file. In this case, you can rebase them to
+be relative to the current directory.
+  sources = rebase_path(gypi_values.sources, ".",
+                        "//path/gypi/input/values/are/relative/to")
+This script will tolerate a 'variables' in the toplevel dictionary or not. If
+the toplevel dictionary just contains one item called 'variables', it will be
+collapsed away and the result will be the contents of that dictinoary. Some
+.gypi files are written with or without this, depending on how they expect to
+be embedded into a .gyp file.
+This script also has the ability to replace certain substrings in the input.
+Generally this is used to emulate GYP variable expansion. If you passed the
+argument "--replace=<(foo)=bar" then all instances of "<(foo)" in strings in
+the input will be replaced with "bar":
+  gypi_values = exec_script("//build/gypi_to_gn.py",
+                            [ rebase_path("your_file.gypi"),
+                              "--replace=<(foo)=bar"],
+                            "scope",
+                            [ "your_file.gypi" ])
+"""
+
+from __future__ import absolute_import
+from __future__ import print_function
+from optparse import OptionParser
+import os
+import sys
+
+
+# Look for standalone GN distribution.
+def FindGNPath():
+  for i in os.environ['PATH'].split(os.pathsep):
+    if i.rstrip(os.sep).endswith('gn'):
+      return i
+  return None
+
+
+try:
+  # May already be in the import path.
+  import gn_helpers
+except ImportError:
+  # Add src/build to import path.
+  src_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
+                            os.pardir, os.pardir))
+  sys.path.append(os.path.join(src_dir, 'build'))
+  if FindGNPath():
+    sys.path.append(os.path.join(FindGNPath(), 'build'))
+  import gn_helpers
+
+
+def LoadPythonDictionary(path):
+  file_string = open(path).read()
+  try:
+    file_data = eval(file_string, {'__builtins__': None}, None)
+  except SyntaxError as e:
+    e.filename = path
+    raise
+  except Exception as e:
+    raise Exception("Unexpected error while reading %s: %s" % (path, str(e)))
+
+  assert isinstance(file_data, dict), "%s does not eval to a dictionary" % path
+
+  # Flatten any variables to the top level.
+  if 'variables' in file_data:
+    file_data.update(file_data['variables'])
+    del file_data['variables']
+
+  # Strip all elements that this script can't process.
+  elements_to_strip = [
+    'conditions',
+    'direct_dependent_settings',
+    'target_conditions',
+    'target_defaults',
+    'targets',
+    'includes',
+    'actions',
+  ]
+  for element in elements_to_strip:
+    if element in file_data:
+      del file_data[element]
+
+  return file_data
+
+
+def ReplaceSubstrings(values, search_for, replace_with):
+  """Recursively replaces substrings in a value.
+  Replaces all substrings of the "search_for" with "repace_with" for all
+  strings occurring in "values". This is done by recursively iterating into
+  lists as well as the keys and values of dictionaries."""
+  if isinstance(values, str):
+    return values.replace(search_for, replace_with)
+
+  if isinstance(values, list):
+    result = []
+    for v in values:
+      # Remove the item from list for complete match.
+      if v == search_for and replace_with == '':
+        continue
+      result.append(ReplaceSubstrings(v, search_for, replace_with))
+    return result
+
+  if isinstance(values, dict):
+    # For dictionaries, do the search for both the key and values.
+    result = {}
+    for key, value in values.items():
+      new_key = ReplaceSubstrings(key, search_for, replace_with)
+      new_value = ReplaceSubstrings(value, search_for, replace_with)
+      result[new_key] = new_value
+    return result
+
+  # Assume everything else is unchanged.
+  return values
+
+
+def DeduplicateLists(values):
+  """Recursively remove duplicate values in lists."""
+  if isinstance(values, list):
+    return sorted(list(set(values)))
+
+  if isinstance(values, dict):
+    for key in values:
+      values[key] = DeduplicateLists(values[key])
+  return values
+
+
+def main():
+  parser = OptionParser()
+  parser.add_option("-r", "--replace", action="append",
+    help="Replaces substrings. If passed a=b, replaces all substrs a with b.")
+  (options, args) = parser.parse_args()
+
+  if len(args) != 1:
+    raise Exception("Need one argument which is the .gypi file to read.")
+
+  data = LoadPythonDictionary(args[0])
+  if options.replace:
+    # Do replacements for all specified patterns.
+    for replace in options.replace:
+      split = replace.split('=')
+      # Allow "foo=" to replace with nothing.
+      if len(split) == 1:
+        split.append('')
+      assert len(split) == 2, "Replacement must be of the form 'key=value'."
+      data = ReplaceSubstrings(data, split[0], split[1])
+
+  gn_dict = {}
+  for key in data:
+    gn_key = key.replace('-', '_')
+    # Sometimes .gypi files use the GYP syntax with percents at the end of the
+    # variable name (to indicate not to overwrite a previously-defined value):
+    #   'foo%': 'bar',
+    # Convert these to regular variables.
+    if len(key) > 1 and key[len(key) - 1] == '%':
+      gn_dict[gn_key[:-1]] = data[key]
+    else:
+      gn_dict[gn_key] = data[key]
+
+  print(gn_helpers.ToGNString(DeduplicateLists(gn_dict)))
+
+if __name__ == '__main__':
+  try:
+    main()
+  except Exception as e:
+    print(str(e))
+    sys.exit(1)
diff --git a/tools/search_files.py b/tools/search_files.py
new file mode 100755
index 00000000000000..65d0e1be42f0a8
--- /dev/null
+++ b/tools/search_files.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+# Copyright 2008 the V8 project authors.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import sys
+
+from utils import SearchFiles
+
+
+if __name__ == '__main__':
+  try:
+    files = SearchFiles(*sys.argv[2:])
+    files = [ os.path.relpath(x, sys.argv[1]) for x in files ]
+    print('\n'.join(files))
+  except Exception as e:
+    print(str(e))
+    sys.exit(1)
diff --git a/unofficial.gni b/unofficial.gni
new file mode 100644
index 00000000000000..29685d4ade559f
--- /dev/null
+++ b/unofficial.gni
@@ -0,0 +1,352 @@
+# Copyright (c) 2013-2019 GitHub Inc.
+# Copyright 2019 the V8 project authors. All rights reserved.
+# Copyright 2023 Microsoft Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by GN for building, which is NOT the build system used for
+# building official binaries.
+# Please take a look at node.gyp if you are making changes to build system.
+
+import("node.gni")
+import("$node_v8_path/gni/snapshot_toolchain.gni")
+import("$node_v8_path/gni/v8.gni")
+
+# The actual configurations are put inside a template in unofficial.gni to
+# prevent accidental edits from contributors.
+template("node_gn_build") {
+  config("node_features") {
+    defines = []
+    if (is_component_build) {
+      defines += [
+        "USING_UV_SHARED",
+        "USING_V8_SHARED",
+      ]
+    }
+    if (node_use_openssl) {
+      defines += [ "HAVE_OPENSSL=1" ]
+    } else {
+      defines += [ "HAVE_OPENSSL=0" ]
+    }
+    if (node_use_v8_platform) {
+      defines += [ "NODE_USE_V8_PLATFORM=1" ]
+    } else {
+      defines += [ "NODE_USE_V8_PLATFORM=0" ]
+    }
+    if (node_enable_inspector) {
+      defines += [ "HAVE_INSPECTOR=1" ]
+    } else {
+      defines += [ "HAVE_INSPECTOR=0" ]
+    }
+    if (node_use_node_code_cache) {
+      defines += [ "NODE_USE_NODE_CODE_CACHE=1"]
+    }
+    if (v8_enable_i18n_support) {
+      defines += [ "NODE_HAVE_I18N_SUPPORT=1" ]
+    } else {
+      defines += [ "NODE_HAVE_I18N_SUPPORT=0" ]
+    }
+  }
+
+  config("node_external_config") {
+    include_dirs = [
+      target_gen_dir,
+      "src",
+    ]
+    defines = [
+      "NODE_WANT_INTERNALS=1",
+      "NODE_EMBEDDER_MODULE_VERSION=$node_module_version",
+    ]
+    configs = [
+      ":node_features",
+      "$node_v8_path:external_config",
+    ]
+  }
+
+  config("node_internal_config") {
+    visibility = [
+      ":*",
+      "src/inspector:*",
+    ]
+    configs = [ ":node_external_config" ]
+    libs = []
+    cflags = [ "-Wno-microsoft-include" ]
+    cflags_cc = [
+      "-Wno-deprecated-declarations",
+      "-Wno-extra-semi",
+      "-Wno-implicit-fallthrough",
+      "-Wno-macro-redefined",
+      "-Wno-return-type",
+      "-Wno-shadow",
+      "-Wno-sometimes-uninitialized",
+      "-Wno-string-plus-int",
+      "-Wno-string-conversion",
+      "-Wno-unreachable-code",
+      "-Wno-unreachable-code-break",
+      "-Wno-unreachable-code-return",
+      "-Wno-unused-label",
+      "-Wno-unused-private-field",
+      "-Wno-unused-variable",
+      "-Wno-unused-function",
+    ]
+
+    if (target_cpu == "x86") {
+      node_arch = "ia32"
+    } else {
+      node_arch = target_cpu
+    }
+    if (target_os == "win") {
+      node_platform = "win32"
+    } else if (target_os == "mac") {
+      node_platform = "darwin"
+    } else {
+      node_platform = target_os
+    }
+    defines = [
+      "NODE_ARCH=\"$node_arch\"",
+      "NODE_PLATFORM=\"$node_platform\"",
+      "NODE_REPORT"
+    ]
+
+    if (is_win) {
+      defines += [
+        "NOMINMAX",
+        "_UNICODE=1",
+      ]
+    } else {
+      defines += [ "__POSIX__" ]
+    }
+    if (node_tag != "") {
+      defines += [ "NODE_TAG=\"$node_tag\"" ]
+    }
+    if (node_v8_options != "") {
+      defines += [ "NODE_V8_OPTIONS=\"$node_v8_options\"" ]
+    }
+    if (node_release_urlbase != "") {
+      defines += [ "NODE_RELEASE_URLBASE=\"$node_release_urlbase\"" ]
+    }
+    if (node_use_openssl) {
+      defines += [
+        "NODE_OPENSSL_SYSTEM_CERT_PATH=\"$node_openssl_system_ca_path\"",
+      ]
+    }
+  }
+
+  gypi_values = exec_script("./tools/gypi_to_gn.py",
+                            [ rebase_path("node.gyp"),
+                              "--replace=<@(node_builtin_shareable_builtins)=" ],
+                            "scope",
+                            [ "node.gyp" ])
+
+  source_set("libnode") {
+    configs += [ ":node_internal_config" ]
+    public_configs = [
+      ":node_external_config",
+      "deps/googletest:googletest_config",
+    ]
+    public_deps = [
+      "deps/ada",
+      "deps/uv",
+      "deps/base64",
+      "$node_v8_path",
+    ]
+    deps = [
+      ":run_node_js2c",
+      "deps/brotli",
+      "deps/cares",
+      "deps/histogram",
+      "deps/llhttp",
+      "deps/nghttp2",
+      "deps/ngtcp2",
+      "deps/postject",
+      "deps/simdutf",
+      "deps/uvwasi",
+      "//third_party/zlib",
+      "$node_v8_path:v8_libplatform",
+    ]
+
+    sources = [
+      "$target_gen_dir/node_javascript.cc",
+    ] + gypi_values.node_sources
+
+    if (is_win) {
+      libs = [ "psapi.lib" ]
+    }
+    if (is_mac) {
+      frameworks = [ "CoreFoundation.framework" ]
+    }
+
+    if (v8_enable_i18n_support) {
+      deps += [ "//third_party/icu" ]
+    }
+    if (node_use_openssl) {
+      public_deps += [ "deps/openssl" ]
+      sources += gypi_values.node_crypto_sources
+    }
+    if (node_enable_inspector) {
+      deps += [
+        "src/inspector:node_protocol_generated_sources",
+        "src/inspector:v8_inspector_compress_protocol_json",
+      ]
+      include_dirs = [
+        "$target_gen_dir/src",
+        "$target_gen_dir/src/inspector",
+      ]
+      node_inspector = exec_script(
+          "./tools/gypi_to_gn.py",
+          [ rebase_path("src/inspector/node_inspector.gypi"),
+            "--replace=<(SHARED_INTERMEDIATE_DIR)=$target_gen_dir" ],
+          "scope",
+          [ "src/inspector/node_inspector.gypi" ])
+      sources += node_inspector.node_inspector_sources +
+                 node_inspector.node_inspector_generated_sources
+    }
+  }
+
+  executable(target_name) {
+    forward_variables_from(invoker, "*")
+
+    sources = [ "src/node_main.cc" ]
+    deps = [ ":libnode" ]
+    if (node_use_node_snapshot) {
+      sources += [ "$target_gen_dir/node_snapshot.cc" ]
+      deps += [ ":run_node_mksnapshot" ]
+      if (is_clang || !is_win) {
+        cflags_cc = [
+          "-Wno-c++11-narrowing",
+          "-Wno-shadow",
+        ]
+      }
+    } else {
+      sources += [ "src/node_snapshot_stub.cc" ]
+    }
+    output_name = "node"
+  }
+
+  if (node_use_node_snapshot) {
+    if (current_toolchain == v8_snapshot_toolchain) {
+      executable("node_mksnapshot") {
+        configs += [ ":node_internal_config" ]
+        sources = [
+          "src/node_snapshot_stub.cc",
+          "tools/snapshot/node_mksnapshot.cc",
+        ]
+        deps = [ ":libnode" ]
+      }
+    }
+
+    action("run_node_mksnapshot") {
+      deps = [ ":node_mksnapshot($v8_snapshot_toolchain)" ]
+      script = "$node_v8_path/tools/run.py"
+      sources = []
+      data = []
+
+      mksnapshot_dir = get_label_info(":node_mksnapshot($v8_snapshot_toolchain)",
+                                      "root_out_dir")
+
+      outputs = [ "$target_gen_dir/node_snapshot.cc" ]
+      args = [
+        "./" + rebase_path(mksnapshot_dir + "/node_mksnapshot", root_build_dir),
+        rebase_path("$target_gen_dir/node_snapshot.cc", root_build_dir),
+      ]
+    }
+  }
+
+  action("generate_config_gypi") {
+    script = "tools/generate_config_gypi.py"
+    outputs = [ "$target_gen_dir/config.gypi" ]
+    depfile = "$target_gen_dir/$target_name.d"
+    script_args = [ "$root_build_dir" ]
+    script_args += outputs
+    script_args += [ depfile ]
+    args = rebase_path(script_args, root_build_dir)
+  }
+
+  executable("node_js2c") {
+    deps = [
+      "deps/simdutf",
+      "deps/uv",
+    ]
+    sources = [
+      "tools/js2c.cc",
+      "tools/executable_wrapper.h",
+    ]
+  }
+
+  action("run_node_js2c") {
+    script = "$node_v8_path/tools/run.py"
+    deps = [
+      ":node_js2c($host_toolchain)",
+      ":generate_config_gypi",
+    ]
+
+    node_deps_files = gypi_values.deps_files + node_builtin_shareable_builtins
+    node_library_files = exec_script("./tools/search_files.py",
+                                     [ rebase_path(".", root_build_dir),
+                                       rebase_path("lib", root_build_dir),
+                                       "js" ],
+                                     "list lines")
+
+    inputs = node_library_files +
+             node_deps_files +
+             [ "$target_gen_dir/config.gypi" ]
+    outputs = [ "$target_gen_dir/node_javascript.cc" ]
+
+    # Get the path to node_js2c executable of the host toolchain.
+    if (host_os == "win") {
+      host_executable_suffix = ".exe"
+    } else {
+      host_executable_suffix = ""
+    }
+    node_js2c_path =
+        get_label_info(":node_js2c($host_toolchain)", "root_out_dir") + "/" +
+        get_label_info(":node_js2c($host_toolchain)", "name") +
+        host_executable_suffix
+
+    args = [ rebase_path(node_js2c_path),
+             rebase_path("$target_gen_dir/node_javascript.cc"),
+             "--root", rebase_path("."),
+             "lib", rebase_path("$target_gen_dir/config.gypi") ] +
+           node_deps_files
+  }
+
+  executable("node_cctest") {
+    testonly = true
+    configs += [ ":node_internal_config" ]
+
+    deps = [
+      ":libnode",
+      "deps/googletest",
+      "deps/googletest:gtest_main",
+      "deps/simdutf",
+    ]
+
+    sources = gypi_values.node_cctest_sources
+    if (node_use_openssl) {
+      sources += gypi_values.node_cctest_openssl_sources
+    }
+    if (node_enable_inspector) {
+      sources += gypi_values.node_cctest_inspector_sources
+    }
+  }
+
+  executable("node_embedtest") {
+    output_name = "embedtest"
+    testonly = true
+    deps = [ ":libnode" ]
+    sources = [
+      "src/node_snapshot_stub.cc",
+      "test/embedding/embedtest.cc",
+    ]
+  }
+
+  executable("overlapped_checker") {
+    output_name = "overlapped-checker"
+    testonly = true
+    if (is_win) {
+      sources = [ "test/overlapped-checker/main_win.c" ]
+    } else {
+      sources = [ "test/overlapped-checker/main_unix.c" ]
+    }
+  }
+}