The PlayStation Portable (PSP) was discontinued in 2014. Its hardware maxed out at 333 MHz processor and 64 MB of RAM. Grand Theft Auto V was released in 2013 for the PS3 and Xbox 360—consoles with exponentially more power.
Stick to real PSP ISOs for PPSSPP, or buy the official Rockstar ports. Your phone’s security (and your sanity) will thank you. Gta V Iso File Fixed Download For Ppsspp -psp- On Android
If you want a native Grand Theft Auto experience on the PPSSPP emulator, these are the only official titles available for the platform: Grand Theft Auto: Liberty City Stories Grand Theft Auto: Vice City Stories Grand Theft Auto: Chinatown Wars GTA 5 PSP: Download & Play Guide - Ftp The PlayStation Portable (PSP) was discontinued in 2014