As many G.55s were made and used as were C.205s. It along with the C.205 made up the entirety of front line fighters after Italy surrendered. 50% of a frontline force... I know we're talking the IT air force here, nothing compared to the Soviets or the Yanks, but 50% of it, nothing to sneeze at.
I personally would like to see it in-game someday. It would probably replace my favorite ride (C.205).
'50%' if you ignore actual ratios of the aircraft, the older types still in use, and, especially, all of the 109's the ANR got from Germany...

(YES for Italians, they didn't have a whole lot to be proud of during the war and this decent aircraft is one of their highlights).
Beside the fact that the Italians had much more significant aircraft, this comment is just...

Anyway, you guys realize that, whether or not it was better than any Axis aircraft of its day, its day was 1943, right? Its competition would have been the Bf 109G-6 and the A-4 through -8 190's. We're not talking about a Kurfurst/Dora killer here.