Quick (and non-definitive answer, just to point you on the right track.)
I believe the only way to do this is to reassign within each gig file in the editor. It\'s definitely NOT a global function.
OTOH, you could buy a box from Midi Solutions that reassigns the controllers. They\'re not real cheap (around $129-199, I believe) but they work pretty well, and can reassign several CCs at once. They can also assign things like pitch bend to CC and vice versa, so there may be real use for this in the GS universe.