Gravity spells in the KH universe typically manifests itself through the Magnet spell.

I thought it could be utilized in a smaller form. Isolate it to the extremities. Bind your hands and feet to surfaces so you can scale surfaces. Or create a small repelling force at your palms to catch and halt weapons with just your hands.

Naturally he would have to practice it. Might as well work on his natural sense of balance. The more you balance the less Gravity Magic you have to use to stabilize yourself.