Galactus' rules state that he is not affected by exploit weakness and anything that resembles that, so is he affected by the object Meteorite?? LMK thanks!

This is one of those times where you'd want to post text...here you go...

Now, the object only says damage can't be modified. Exploit or Psychic Blast IGNORE damage reducers. That's not what Meteorite does. From the way I'm reading, I'd say hit him with it!!!

Meteorite does not duplicate the effects of Exploit Weakness. It simply deals damage that can't be modified. EW deals penetrating damage.