Some websites claim to offer PSP ISO files that work on Android via PPSSPP (a PSP emulator). Here's why that's misleading for San Andreas:

Open PPSSPP, navigate to the folder where you saved the ISO, and launch the game. 4. System Requirements for a Smooth Experience

Rockstar re-released an enhanced of GTA: San Andreas in late 2023. If you have a Netflix subscription, you can download it for free (with your subscription) directly from the Play Store. This version:

While there are many online links claiming to offer a " GTA San Andreas PSP ISO" for Android, there is no official PSP version of Grand Theft Auto: San Andreas