Weaker than Namek goku because he still wasnt strong enough to become SSj.He needed like 2 months in Rosat to achieve necessary power to become Ssj.But then again trunks who was GInyu force Tier was able to become Ssj. I have him at 2,5 mill personally
I used to have him close to Android Arc Goku, because, in spirit room, Goku said ''once you become SSJ, you'll be a great
sparring partner''. But, other people theorize he's a lot weaker than that, because Suppressed Piccolo got an SSJ like
boost and Gohan was implied to be weaker to Suppressed Piccolo.
Nevertheless, i don't think he's as low as Namek Goku. Goku never said Gohan wasn't already strong enough to become
SSJ, he just focused on him getting angry.
He had a higher base power after Namek and had better training, so I think he should be more powerful than them. People aren't shocked Gohan achieved SSJ after the Rosat too, only at the power he had against Cell.