1977 IMSA GT Championship season Tags: Motorsport Season.The 1977 Camel GT Challenge season was the 7th season of the IMSA GT Championship auto racing series. The series was for GTO and GTU class Grand tourer racing cars. It began February 5 1977 and ended October 26 1977 after sixteen rounds. series IMSA GT Championship year 1977-01-01T00:00:00+02:00 Learn more... Loading...