Not to mention that Gambit is 43 years old by the time X-2 rolls around...so if he were to ever appear in normal continuity, even in the next film, he should be about 50 years old, requiring a different actor.
How is Gambit 43? X2 takes place 15 years after we see Gambit. So Gambit is 28 in Origins? Says who?
Who says Gambit wasn't 20? Therefore making him 35 in X2 and only 3 yrs older than Cyclops.
X1-X3 had a tight timeline.. don't know if it was ever noted... could have all been within 1-2 years. Depending on when X4 takes place... Gambit could still be in his late 30s.
Fact is.. it's never said how old he is. And they can reasonably make him as young as they like to make him be as young as possible during the next movie(s).