Agreed, Paso Finos are gaited from birth. Some are more hyper then others, depends on the bloodlines and the individual horse. Since he isnt purebred, there might be something in him that counter acts the Paso Fino in personality, so who knows? If he doesnt have any major conformation faults that would prevent him from jumping comfortably, why not? They are a versitile horse, one that should be able to do anything, conformation willing. Good luck! You should post some pics of your horse.
Shaneequah, 1998 gaited Bashkir CurlyxArab mare
Johnny Cash, 2001 Arab x pony gelding
Brighty, 2013 Standard Donkey jack