This is the post where the belt sander might come in handy! Gorilla glue does not come off easy, on drywall you will certainly peel the paper facing off while trying to take off the gorilla glue. I would probably use a small razor knife to score around the glued areas and "peel" the drywall paper face off, then prime with Guardz, skim coat with some joint compound, sand, another coat of guardz, then paint.

Keep the kids away from the Gorilla glue!!

 

We had a similar problem with some border paper my daughter put up at the top of the walls of her room. Of course when she left home, she did not take this with her. It seems she used something like yellow 3-M adhesive to put this border paper up. We eventually tried "Goof Off" ( I think that was the name). This did not readily remove the glue but wetting it with this stuff made it so we could sort of "roll" it off and did not have to remove the paper surface of the drywall. Two coats of primer and two coats of paint finished it out. David

 

If it were a different product I'd have more suggestions, but for that stuff it's a chisel and/or sander
Sorry