If its into wood, I use 30 minute epoxy. If its into a composite structure, I use Hysol. Just lube all around the actual hinge area with Vasoline and the epoxy won't stick to it. I haven't tried Gorilla glue, but I would think you'd have to be careful that the glue didn't foam out all over the place...

Robart hinge points are da' bomb... second only to live hinging

Bob