Gran Turismo is a popular racing video game series known for its realistic simulation of driving and racing. As of my last knowledge update in September 2021, the Gran Turismo series has not officially included cheat codes in the traditional sense. Unlike some other games, Gran Turismo developers, Polyphony Digital, have emphasized realism and a fair playing field for all players.

However, it’s worth noting that some players and modders have found ways to modify the game files or use external devices to access certain benefits or advantages, which could be considered cheats. These modifications might include unlocking cars or tracks, obtaining extra in-game currency, or altering performance parameters. It’s essential to exercise caution when using any unofficial methods, as they can potentially lead to unintended consequences or even cause issues with the game’s functionality.

Moreover, cheating in online multiplayer modes or using external cheats is not only discouraged but also against the terms of service of most gaming platforms and may result in penalties or account suspensions.

In summary, while the official Gran Turismo games do not typically include traditional cheat codes, some unofficial methods and modifications may exist. However, players are encouraged to enjoy the game as intended by the developers, embracing the challenge of realistic racing and fair competition.