This is the legal requirement. You must own a copy of Gran Turismo 5 (the disc) or a digital license.
Gran Turismo 5 (GT5) is a racing simulation game developed by Polyphony Digital and published by Sony Computer Entertainment. The game was initially released in 2010 for the PlayStation 3 console. It's the fifth main installment in the Gran Turismo series and is considered one of the most realistic and visually stunning racing games ever created. gran turismo 5 free download pc game full version updated