As G4M3R pointed out in the forums, GTR Racing is being shipped in the US on May 3rd. Here is the full press release form the GTR Racing homepage:
GTR is the new ultra-realistic simulation based on the FIA GT Championship racing series featuring the most exciting sport cars of the world as well as the prestigious "24 Hours of Spa" race. "GTR is the ultimate race car simulation, offering gamers the heart pounding-adrenalin pumping sensation that can only come from a truly realistic racing experience," said Carlo Voelker, CEO of Viva Media. He further comments, "By bringing this game to market, Viva Media marks its new partnership with 10tacle AG, and adds another extraordinary game to its catalogue of fine multimedia products."
"We pulled out all the stops and completely loaded GTR with high-end assets to please casual gamers and the professionals as well. In other words, nothing has been spared to make this the best ever race car sim," said Frank Holz, 10tacle Studios Marketing and Sales Director. He continues, "Developed and tested by real race drivers GTR breaks all barriers by delivering a new level of real race feeling." Featuring the real GT racing teams, you can race the Chrysler Viper GTS-R, Porsche 996 GT3, Ferrari 575 Maranello, Corvette C5-R and many more cars in the original FIA GT Championship first-hand on your PC. Pit your skills against over 70 different opponents on legendary racecourses such as Monza, Donington Park, Magny-Cours and Barcelona.
News source: GTR Racing homepage