bookup.com

The .4MD files, which are the opening books used by Bookup's Chess Openings Wizard, are typically stored within Emoji Kitchen the app's internal storage. On Android, many apps use a proprietary format to store their data, and it might not be directly accessible through the file system like tradition...

If you're seeing the "G" next to a specific move and it doesn't align with your expectations for the main line, it might be worth checking Geometry Dash the move's popularity or frequency in databases of professional games to get a clearer understanding.