This is almost certainly the game you are looking for.
(GTA 6) is being developed for PlayStation 5, Xbox Series X|S , and later possibly PC. It is not a PSP game, and it never will be. PPSSPP is an emulator for the PlayStation Portable (PSP), a handheld console from 2004–2014. The PSP’s hardware is nowhere near powerful enough to run GTA 6, even if someone tried to port it. ppsspp gta 6
If you search “PPSSPP GTA 6,” you’ll likely encounter: This is almost certainly the game you are looking for
Keep your PPSSPP emulator installed. Play Vice City Stories with upscaled HD graphics. It holds up remarkably well. But if you see a YouTube video promising "PPSSPP GTA 6 Full Gameplay," report it, block the creator, and save yourself from malware. Xbox Series X|S