I know this post is long dormant but just wanted to add my support for Mid-Ohio. It has immense real-world prestige and racing pedigree.
Built in 1962 by Les Griebling for sports car racing, it’s hosted elite series for decades: NTT IndyCar (since 1980, annual event), IMSA WeatherTech SportsCar Championship (since 2018), ARCA Menards, NASCAR Camping World Truck Series, SVRA SpeedTour, and more. Its 2025 schedule alone includes the 43rd Permco Grand Prix of Mid-Ohio.
Forza already has it, time for Gran Turismo to catch up!