I know he returned kickoffs (not punts) in college. I just think Gibson has a confidence issue and i dont think special teams is returning kicks in high pressure situations is the place to put him to get that confidence back. Also, holding on to the ball as a between the tackles runner or as a kick returner is one and the same. If you have an issue holding it, it will be an issue in both places, in my view.
I dont want to do either with Gibson. He's skilled and valuable, but the fumbling needs to be fixed. Tiki Barber managed to do it. Hold the ball high and tight--with two hands in traffic. This is all about repetition. Make him carry that ball around like in the Program and have teammates try to dislodge it.