Similar to its predecessors, Gran Turismo Sport is a racing game and includes two game modes: "Sport Mode" and "Arcade Mode". Online racing is also featured in the game and saving is only allowed in online mode, unlike its predecessors. The game has been described as different from the "Prologue" titles seen in the past in the series and features more content. Unlike Gran Turismo 5 and 6, the game does not feature a dynamic weather system or day-night cycle, but players still have the option to modify the race's time of day before entering the race.[6] It includes 338 cars and 82 configurations in 32 locations to race on as of July 2021.[7]
For the first time in the series, the game features Porsche vehicles included in the game after Electronic Arts' licensing rights to the Porsche brand had expired (previous Gran Turismo installments included Ruf cars as a substitute).[8]