Apps by Gabriele Proietti Mattia, built and signed by the developer. These are binary builds — the source is not published, so this is a repository of its own and not part of f-droid.org. The builds served here carry no Google dependency: no Play Billing, no Firebase.

Currently it serves 10 apps. To add it to your F-Droid app, scan the QR code (click it to enlarge) or use this link:

https://releases.android.apps.gpm.name/repo

If you would like to manually verify the fingerprint (SHA-256) of the repository signing key, here it is:
C9 83 73 56 6E EC 23 5E CE FB 7D 29 A5 82 63 67 4D 80 B4 32 86 99 2B CB 7A CB 3A A4 3C A3 C4 1E