Small, homebrew projects that use a single street or building from Los Santos, but lack the full story, missions, or map.
If you want the authentic GTA 5 experience on your phone, avoid "ISO" downloads and use legitimate methods:
GTA 5 was never released for the PlayStation Portable (PSP). The PPSSPP emulator can only run native PSP games or modified versions of existing PSP titles.
A texture pack for GTA: Vice City Stories that changes character models (like Franklin or Michael) and UI elements to resemble GTA 5.