Disable on Windows

Author: domesticmouse

flutter_ci_script_shared.sh

@@ -47,10 +47,16 @@ function ci_codelabs () {
             if [ -d "test" ]
             then
                 if grep -q "flutter:" "pubspec.yaml"; then
+
+                    # intro_flutter_gpu only runs with Impeller
                     if [ $CODELAB = 'intro_flutter_gpu' ]; then
+                        if [ $RUNNER_OS = 'macOS' ] || [ $RUNNER_OS = 'Linux' ]; then
                         flutter config --enable-native-assets
                         flutter build `echo $RUNNER_OS | tr '[:upper:]' '[:lower:]'` --debug
                         flutter test --enable-impeller
+                        else
+                            echo "Skipping $CODELAB on $RUNNER_OS"
+                        fi
                     else
                         flutter test
                     fi