Not counting the ones that are already in GT1 - GT4 (cause PD should put all of them in GT5).
Oval/road courses
- Daytona International Speedway
- Indianapolis Motor Speedway
- Lausitzring (EuroSpeedway)
Permanent road courses
- Autodromo Hermanos Rodriguez
- Brands Hatch
- Circuit Gilles Villeneuve
- Fundidora Park
- Imola
- Interlagos
- Mid-Ohio
- Monza
- Portland International Raceway
- Road Atlanta
- Road America
- Sebring International Raceway
- Silverstone Circuit
- Spa-Francorchamps
- Watkins Glen International
- Virginia International Raceway
Temporary street courses
- Burke Lakefront Airport, Cleveland, OH, USA
- Finning International Speedway - Edmonton, AB, Canada
- Long Beach, CA, USA
- Surfers Paradise, Australia
- Toronto, Canada