Question: can ssj2 gohan beat broly?
Answer: Fights in DBZ don't work like that. You haven't explained how SSJ2 Kid Gohan could be equal to Broly. In the first movie Broly was already much stronger than PC. But then after the Zenkai boost, Broly had to be stronger than SPC which is=SSJ2 Kid Gohan, meaning that Broly is stronger than the two.