Question: can gohan go super saiyan?
Answer: Unlike Goku and Vegeta, Gohan is only half-Saiyan. ... Having his potential unlocked by Grand Kai meant that he gained access to "all" his power, so going Super Saiyan wouldn't do anything for him while in his Ultimate form. The Super Saiyan form can't bring out any more of his power if he's already using it.