G50/G55 classification

[Fantuzzi]

Just curious given the new addition to the Ginetta range (GT3/GT4), are the G50/55's classed as gt4/3 spec as sold or do they have to under go some changes compared to the cars that race in the supercup?

Just wondering if the new GT3/GT4 is to make their cars better suited for GT racing in those classes and endurance races, or whether it was something else such as a regulations change for 2012?

Thanks