If Gendry was Gendry, then nothing would really change. Since Gendry is already Gendry, there wouldn't be any alterations to his identity or character.

What if Gendry was Gendry? Well, that would be quite the surprising twist! Maybe we would discover that he is actually his own long-lost twin, separated at birth. Or perhaps he has been secretly time-traveling and encounters his past self. Either way, it would definitely make for an entertaining and confusing storyline in the Game of Thrones universe!