Premise: Rock Star Supernova was a reality television-formed supergroup consisting of drummer Tommy Lee (Mötley Crüe), bassist Jason Newsted (ex-Metallica), guitarist Gilby Clarke (ex-Guns N' Roses) and singer Lukas Rossi. The band was formed during the second season of the Rock Star Reality TV series which was called .
Hypothesis: Guns N' Roses formerly had a guitar player whose initials are GC