It was developed by Image Space Incorporated for Electronic Arts . I heard of another sim called 'Professional Sports Car Racing' which has GT cars. These two simulations are in fact one and the same. The title was acquired from Virgin Interactive by EA in 1998, and the licence with Professional Sports Car was terminated. Other information has been gleaned from posters to the usenet group rec.autos. simulators .
Further information is 'unofficial information from official sources'.
This generally means that I have acquired certain snippets of information directly from the developers, but have been asked not to quote them directly. Top class tracks, including Road Atlanta, Sebring, Laguna Seca, Donington Park and Hockenheim. There are also some tracks created specially for the sim. Start in GTQ to earn your spurs, and move through GT3, GT2 and finally to GT1, based on your earnings from good race performances. Expect rain with a wet reflective track, and night races.