diff --git a/.github/workflows/compilers.yml b/.github/workflows/compilers.yml
index 5e9abde523fb39..e669a001fde252 100644
--- a/.github/workflows/compilers.yml
+++ b/.github/workflows/compilers.yml
@@ -211,9 +211,9 @@ jobs:
           - { name: UNIVERSAL_PARSER,               env: { cppflags: '-DUNIVERSAL_PARSER' } }
           - name: SHARED_GC
             shared_gc: true
-            shared_gc_dir: '../gc'
+            shared_gc_dir: '/ruby_gc'
             env:
-              append_configure: '--with-shared-gc=../gc'
+              append_configure: '--with-shared-gc=/ruby_gc'
 
     name: ${{ matrix.entry.name }}
 
@@ -263,9 +263,9 @@ jobs:
 
       - name: Build shared GC
         run: >
-          echo "RUBY_GC_LIBRARY=librubygc.gc_impl.so" >> $GITHUB_ENV &&
+          echo "RUBY_GC_LIBRARY=librubygc.default.so" >> $GITHUB_ENV &&
           mkdir ${{ matrix.entry.shared_gc_dir }} &&
-          make shared-gc SHARED_GC=gc_impl
+          make shared-gc SHARED_GC=default
         if: ${{ matrix.entry.shared_gc }}
 
       - name: Add to ext/Setup
diff --git a/common.mk b/common.mk
index eb1ccbcdeba125..3a9df0d32aebdf 100644
--- a/common.mk
+++ b/common.mk
@@ -1915,7 +1915,7 @@ shared-gc: probes.h
 		exit 1; \
 	else \
 		echo generating $(shared_gc_dir)librubygc.$(SHARED_GC).$(SOEXT); \
-		$(LDSHARED) -I$(srcdir)/include -I$(srcdir) -I$(arch_hdrdir) -I. $(XDLDFLAGS) $(cflags) -fPIC -o $(shared_gc_dir)librubygc.$(SHARED_GC).$(SOEXT) $(srcdir)/$(SHARED_GC).c; \
+		$(LDSHARED) -I$(srcdir)/include -I$(srcdir) -I$(arch_hdrdir) -I. $(XDLDFLAGS) $(cflags) -fPIC -o $(shared_gc_dir)librubygc.$(SHARED_GC).$(SOEXT) $(srcdir)/gc/$(SHARED_GC).c; \
 	fi
 
 help: PHONY
@@ -7506,6 +7506,7 @@ gc_impl.$(OBJEXT): $(CCAN_DIR)/container_of/container_of.h
 gc_impl.$(OBJEXT): $(CCAN_DIR)/list/list.h
 gc_impl.$(OBJEXT): $(CCAN_DIR)/str/str.h
 gc_impl.$(OBJEXT): $(hdrdir)/ruby/ruby.h
+gc_impl.$(OBJEXT): $(top_srcdir)/gc/default.c
 gc_impl.$(OBJEXT): $(top_srcdir)/internal/bits.h
 gc_impl.$(OBJEXT): $(top_srcdir)/internal/compilers.h
 gc_impl.$(OBJEXT): $(top_srcdir)/internal/sanitizers.h
@@ -7527,7 +7528,6 @@ gc_impl.$(OBJEXT): {$(VPATH)}darray.h
 gc_impl.$(OBJEXT): {$(VPATH)}debug.h
 gc_impl.$(OBJEXT): {$(VPATH)}debug_counter.h
 gc_impl.$(OBJEXT): {$(VPATH)}defines.h
-gc_impl.$(OBJEXT): {$(VPATH)}gc_impl.c
 gc_impl.$(OBJEXT): {$(VPATH)}intern.h
 gc_impl.$(OBJEXT): {$(VPATH)}internal/abi.h
 gc_impl.$(OBJEXT): {$(VPATH)}internal/anyargs.h
diff --git a/gc_impl.c b/gc/default.c
similarity index 100%
rename from gc_impl.c
rename to gc/default.c
diff --git a/template/Makefile.in b/template/Makefile.in
index 79a23fcdeb2c39..fc3739b66f38ba 100644
--- a/template/Makefile.in
+++ b/template/Makefile.in
@@ -67,6 +67,7 @@ RUBY_VERSION_NAME = @RUBY_VERSION_NAME@
 UNIVERSAL_ARCHNAMES = @UNIVERSAL_ARCHNAMES@
 BUILTIN_BINARY = @X_BUILTIN_BINARY@
 
+BUILTIN_GC = default
 shared_gc_dir = @shared_gc_dir@
 
 TESTUI = console
@@ -444,6 +445,10 @@ $(srcdir)/enc/jis/props.h: enc/jis/props.kwd
 	  $(CP) $@ $(?:.kwd=.h.blt); \
 	fi
 
+gc_impl.$(OBJEXT): gc/$(BUILTIN_GC).c probes.h
+	@$(ECHO) compiling $<
+	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -c $<
+
 .c.$(OBJEXT):
 	@$(ECHO) compiling $<
 	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -c $<
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index 46213466eb8985..2b791c0562c67a 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -443,6 +443,8 @@ PREP          = miniruby$(EXEEXT)
 BUILTIN_BINARY = yes
 !endif
 
+BUILTIN_GC = default
+
 !if !defined(EXTSTATIC)
 EXTSTATIC     =
 !endif
@@ -1336,6 +1338,11 @@ $(ruby_pc): $(RBCONFIG)
 	$(ECHO) compiling $(<:\=/)
 	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -c $(CSRCFLAG)$(<:\=/)
 
+BUILTIN_GC_PATH = $(srcdir)/gc/$(BUILTIN_GC).c
+gc_impl.obj: $(BUILTIN_GC_PATH)
+	$(ECHO) compiling $(BUILTIN_GC_PATH:\=/)
+	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -c $(CSRCFLAG)$(BUILTIN_GC_PATH:\=/)
+
 {$(srcdir)/missing}.c.asm:
 	$(ECHO) translating $(<:\=/)
 	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) -Fa$@ -c $(CSRCFLAG)$(<:\=/)