.gcm file: how to open it on Windows

2 Windows apps register the .gcm extension. Install one of them to open the file with a double-click.

• 
  Dolphin

  Dolphin emulates the Nintendo GameCube and Nintendo Wii on your PC.

  Open source 5.0 397.9K ↓ ★ 15.7K
• 
  ImgBurn

  ImgBurn is a lightweight CD / DVD / HD DVD / Blu-ray burning application.

  Free 2.5.8.0 207.9K ↓

Related guide: Change the default app for a file type in Windows