Board Thread:Game Discussion/@comment-33869270-20180601065445/@comment-5904736-20180602004634

GT3 is closer to Group A than anything. It was first introduced in 2005 and has since taken over a lot of categories, including Australia's Nations Cup, Japan's SuperGT, and several national GT series, that previously used other international categories, such as GT1. This has been because it's not GT1 or GT2/E. It's cheaper, and easier to get into. GT is pretty much what it says on the tin. It's the third teir of Grand Touring racing, or at least was, before the top teir collapsed, ws rebuilt, then collapsed again.