You will need a digital copy (ISO file) of the game. For safety and legality, it is recommended to dump your own physical PS2 disc using a PC disc drive.
To clarify, Gran Turismo 4 was never ported to PC; it is a PlayStation 2 exclusive. As of 2026, Sony Interactive Entertainment has shown no indication of bringing this title (or even its successor, Gran Turismo 7) to the PC platform. gran turismo 4 pc torrent download verified tpb
