A different approach could be a story where Gohan is the only one who can achieve the Super Saiyan God form due to some unique genetic quirk. The story could explore how this makes him feel isolated from the other Saiyans at first, but then he realizes it's his special responsibility to use this power for the greater good. He could then train other Saiyans in different ways to help them reach a similar level of power, even if not exactly the Super Saiyan God form.
One idea could be Gohan struggling to control the new power of the Super Saiyan God. He might accidentally cause some destruction while training and then have to deal with the guilt and the fear of his power getting out of control.