Torrenting copyrighted material is easily tracked. Your Internet Service Provider may throttle your speeds or forward copyright notices.
But what exactly is a "ROM" in the context of the PS3? Is it legal? How do you run it? And where do you find a safe file?
If you want to play GTA V Online or see Los Santos in stunning 4K, buy the PC version from Steam or the PS5 version. It is regularly on sale for $20.