Originally Posted by
Omegarogue
He has mentioned that he is younger than the original 5, IN CANON, and so it seems by far, he should only be a little older than Rogue, no more, and Rogue is quite a few years younger than the original 5.
Even in the 90's when Rogue was for a brief moment blind, Beast pointed out that some time ago, he and the original 5 were as carefree as Gambit and Rogue at that age.
What it tells you, yes, Gambit is someone quite young, since the original 5 is not that they are elderly.