If your goal is truly to play GTA V on your phone, there are legitimate methods – but they do not involve the PSP emulator:

: These mods often include custom textures and skins to make the original PSP maps look more like the modern Los Santos environment.

The implication is clear: users want a highly compressed, 100MB version of GTA V that can run on the PPSSPP emulator.

Officially, GTA V was released for PlayStation 3, PlayStation 4, Xbox 360, Xbox One, and Microsoft Windows. The PSP, being a handheld console, doesn't have an official version of GTA V, mainly due to hardware limitations.

The internet is full of clickbait YouTube videos showing "GTA V Mobile 100MB PPSSPP" with fake gameplay footage (usually just GTA San Andreas with a HUD mod). Do not fall for it. Your device’s security is not worth the risk.