https://www.gamespot.com/articles/free-ps4-demo-of-gran-turismo-sport-coming-soon-bu/1100-6453755/

PlayStation 4 owners eager to get their hands on the next entry in the Gran Turismo series will soon have the opportunity to try out GT Sport. But you'll need to set aside some time to do so during a very specific window, as the demo will only be available for a limited time prior to the full game's launch.