There are two Super GT classes.
Top category is GT500.
And GT300.
500/300 means their typical horse power.
GT500 class was dominated by works team, Honda, Nissan and Toyota.
Ford GT is GT300.
There are so many machines, PORSCHE GT3RSR, PORSCHE 996GT3R, PORSCHE BOXSTER, Lamborghini MURCIELAGO, Lamborghini GALLARDO GT-3, MOSLER MT900R, Ferrari F360 Modena and Japanese specialties.
You can see Super GT pictures from following link.
SUPERGT.net | 2006 Round5 Photo Gallery
And if there is a space, I will post my pictures.