Gal*Gun Returns save games can be found here:
Save Game Data Location – *We do not recommend removing or altering save data in this folder*
Note: Sometimes you need to show hidden folders in Windows. It is important to enabling Show hidden files, folders. To do that;
- Open File Explorer from the taskbar.
- Select View > Options > Change folder and search options.
- Select the View tab and, in Advanced settings, select Show hidden files, folders, and drives and OK.