diff --git a/src/tools/tidy/config/black.toml b/src/tools/tidy/config/black.toml
index a1e1eef987a..d5b8b198afb 100644
--- a/src/tools/tidy/config/black.toml
+++ b/src/tools/tidy/config/black.toml
@@ -13,5 +13,6 @@ extend-exclude = """(\
     src/doc/embedded-book/|\
     src/tools/rustc-perf/|\
     src/tools/enzyme/|\
-    library/backtrace/
+    library/backtrace/|\
+    src/gcc/
     )"""
diff --git a/src/tools/tidy/config/ruff.toml b/src/tools/tidy/config/ruff.toml
index 2be109010a0..de23d93593c 100644
--- a/src/tools/tidy/config/ruff.toml
+++ b/src/tools/tidy/config/ruff.toml
@@ -18,6 +18,7 @@ extend-exclude = [
     "library/backtrace/",
     "src/tools/enzyme/",
     "src/tools/rustc-perf/",
+    "src/gcc/",
     # Hack: CI runs from a subdirectory under the main checkout
     "../src/doc/nomicon/",
     "../src/tools/cargo/",
@@ -32,6 +33,7 @@ extend-exclude = [
     "../library/backtrace/",
     "../src/tools/enzyme/",
     "../src/tools/rustc-perf/",
+    "../src/gcc/",
 ]
 
 [lint]
diff --git a/src/tools/tidy/src/walk.rs b/src/tools/tidy/src/walk.rs
index 4a69022ebdc..8cbc263689b 100644
--- a/src/tools/tidy/src/walk.rs
+++ b/src/tools/tidy/src/walk.rs
@@ -32,6 +32,7 @@ pub fn filter_dirs(path: &Path) -> bool {
         "src/doc/rust-by-example",
         "src/doc/rustc-dev-guide",
         "src/doc/reference",
+        "src/gcc",
         // Filter RLS output directories
         "target/rls",
         "src/bootstrap/target",