For this and similar fan-made Gravity Falls APKs, the general process on sites like the APK file from a reputable fan-game host like Enable Unknown Sources : Go to your Android device's Settings > Apps

: Utiliza mecánicas de exploración y recolección de archivos o "files" que expanden el lore del juego.

APK files, including Gravity Files, work by allowing users to install Android apps on their devices without going through the Google Play Store. Here's a step-by-step explanation:

Because the game is an RPG Maker project, users typically download the game files as a .zip and run them through apps like Maldives Player or JoiPlay.

If you proceed, common sources (use at your own risk):