As of 2014, there are 20 Great Coasters International (GCI) roller coasters. (This includes the Ozark Wildcat at Celebration City that has been Standing But Not Operating since 2008. It also counts Gwazi at Busch Gardens Tampa as one roller coaster, although one side of duelling Gwazi has been shut down since 2012.) Most of GCI's coasters, like Kentucky Rumbler, opened with Millennium Flyer trains, but there are a few exceptions. Gwazi and Wildcat at Hersheypark started with PTC trains, but were eventually switched over to Millennium Flyers. Roar at Six Flags America is now the only GCI ride that still runs with PTC trains.