what is gran turismo based on

The Gran Turismo movie is based on a true story about a Gran Turismo player named Jann Mardenborough. The plot revolves around Mardenboroughs skills in the racing game, which win him a series of Nissan-sponsored video game competitions. As a result, he is given the opportunity to drive a real race car on an actual racetrack. The movie takes some liberties with key plot points, but it is generally inspired by Mardenborough's real-life experiences.