diff --git a/CMakeLists.txt b/CMakeLists.txt
index 91ea1fbf75..054a97dd92 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -56,6 +56,8 @@ option(FILAMENT_ENABLE_FGVIEWER "Enable the frame graph viewer" OFF)
 
 option(FILAMENT_USE_ABSEIL_LOGGING "Use Abseil to log, may increase binary size" OFF)
 
+option(FILAMENT_ENABLE_EXPERIMENTAL_GCC_SUPPORT "Enable GCC support (unsupported)" OFF)
+
 # This is to disable GTAO for the short-term while we investigate a way to better manage size increases.
 # On the regular filament build (where size is of less concern), we enable GTAO by default.
 option(FILAMENT_DISABLE_GTAO "Disable GTAO" OFF)
@@ -295,15 +297,10 @@ set(TOOLS ${CMAKE_CURRENT_SOURCE_DIR}/tools)
 # ==================================================================================================
 set(MIN_CLANG_VERSION "6.0")
 
-if (CMAKE_C_COMPILER_ID MATCHES "Clang")
-    if (CMAKE_C_COMPILER_VERSION VERSION_LESS MIN_CLANG_VERSION)
-        message(FATAL_ERROR "Detected C compiler Clang ${CMAKE_C_COMPILER_VERSION} < ${MIN_CLANG_VERSION}")
-    endif()
-elseif (NOT MSVC)
-    message(FATAL_ERROR "Detected C compiler ${CMAKE_C_COMPILER_ID} is unsupported")
-endif()
-
-if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+set(FILAMENT_USING_GCC OFF)
+if (CMAKE_C_COMPILER_ID MATCHES "GNU" AND FILAMENT_ENABLE_EXPERIMENTAL_GCC_SUPPORT)
+    set(FILAMENT_USING_GCC ON)
+elseif (CMAKE_C_COMPILER_ID MATCHES "Clang")
     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS MIN_CLANG_VERSION)
         message(FATAL_ERROR "Detected CXX compiler Clang ${CMAKE_CXX_COMPILER_VERSION} < ${MIN_CLANG_VERSION}")
     endif()
@@ -344,7 +341,11 @@ if (MSVC)
     set(CXX_STANDARD "/std:c++latest")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_STANDARD} /W0 /Zc:__cplusplus")
 else()
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_STANDARD} -fstrict-aliasing -Wno-unknown-pragmas -Wno-unused-function -Wno-deprecated-declarations")
+    if(FILAMENT_USING_GCC)
+      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_STANDARD} -Wno-changes-meaning -Wno-return-type -Wno-attributes -Wno-unknown-pragmas -Wno-class-memaccess -Wno-multichar -Wno-deprecated-declarations -Wno-subobject-linkage -Wno-invalid-constexpr")
+    else()
+      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_STANDARD} -fstrict-aliasing -Wno-unknown-pragmas -Wno-unused-function -Wno-deprecated-declarations")
+    endif()
     if (APPLE)
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-nullability-extension")
     endif()
@@ -365,10 +366,14 @@ endif()
 if (LINUX)
     option(USE_STATIC_LIBCXX "Link against the static runtime libraries." ON)
     if (${USE_STATIC_LIBCXX})
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
-        link_libraries("-static-libgcc -static-libstdc++")
-        link_libraries(libc++.a)
-        link_libraries(libc++abi.a)
+        if (FILAMENT_USING_GCC)
+            link_libraries("-static-libgcc -static-libstdc++")
+        else ()
+            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
+            link_libraries("-static-libgcc -static-libstdc++")
+            link_libraries(libc++.a)
+            link_libraries(libc++abi.a)
+        endif()
     endif()
 
     # Only linux, clang doesn't want to use a shared library that is not PIC.
diff --git a/filament/CMakeLists.txt b/filament/CMakeLists.txt
index 8811eb1742..d9fe507939 100644
--- a/filament/CMakeLists.txt
+++ b/filament/CMakeLists.txt
@@ -729,6 +729,18 @@ set(LINUX_COMPILER_FLAGS
 
 if (MSVC)
     set(FILAMENT_WARNINGS /W3)
+elseif (FILAMENT_USING_GCC)
+    # GCC is not officially supported, so use a weaker set of warnings (incl. not using -Werror).
+    set(FILAMENT_WARNINGS
+            -Wall -Wextra-semi -Wundef
+            -Wno-unused-parameter -Wno-missing-field-initializers
+            -Wno-unused-but-set-variable -Wno-unused-variable -Wno-unused-function
+            -Wnon-virtual-dtor -Wimplicit-fallthrough
+            -Wno-strict-aliasing
+            -Wno-changes-meaning -Wno-return-type
+            -Wno-invalid-constexpr -Wno-parentheses
+            -Wno-sign-compare -Wno-deprecated-declarations
+    )
 else()
     set(FILAMENT_WARNINGS
             -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
diff --git a/filament/backend/CMakeLists.txt b/filament/backend/CMakeLists.txt
index a1afda64b5..00e8c6fd63 100644
--- a/filament/backend/CMakeLists.txt
+++ b/filament/backend/CMakeLists.txt
@@ -495,6 +495,13 @@ endif()
 
 if (MSVC)
     set(FILAMENT_WARNINGS /W3)
+elseif (FILAMENT_USING_GCC)
+    # GCC is not officially supported, so use a weaker set of warnings (incl. not using -Werror)
+    set(FILAMENT_WARNINGS
+            -Wall -Wno-unused-parameter -Wno-missing-field-initializers
+            -Wdeprecated -Wnon-virtual-dtor -Wno-strict-aliasing
+            -Wno-invalid-constexpr -Wno-parentheses -Wno-unused-variable
+    )
 else()
     set(FILAMENT_WARNINGS
             -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers