Dude said sense Gohan was able to
survive Goku's final clash and throw a subconscious punch, means he's not too far off from Goku's full power.
I'm pretty sure Goku wasn't trying to kill his own son, but even so Gohan was knocked CLEAN the fukk out. They didnt show the trademark double punch to the face shot and Goku was just fine after the attack so I'm sure Gohan didn't even phase him at that point.
With Gohan though it really doesn't matter how strong he is because he's an absolute terrible fighter and that's been the one consistent thing about him all throughout DBZ and DBS.
People get hyped up on the nostalgia of SSJ2 Gohan vs Cell but if Cell and Gohan were at equal strength, Cell would have mopped the floor with him.
Gohan dropped the ball on Cell and Buu when he had the power. So even his potential to become stronger than Goku is almost meaningless if he doesn't know how to fight.