I played the forza 6 demo and then I bought the game via xbox live network when I booted up the game it tells me that I have the new ford GT because I played the forza 6 demo but the car is nowhere to be found .
have you played through the first group of races
it should either already in your garage or will be found in the “find a car section” under “free cars”
FYI you actually to buy it to get the achievement relating to that car anyway…its only 250,000 credits