I have two florida gar's. One is mine thats 14" in my 125 gallon and the other is my girlfriends thats 9" in her 55 gallon (for now).
My guy, I have trained him to eat frozen foods out of my hands. Same thing with my silver arowana. I feed them Silver slides and krill. The gar even eats the krill right off the top...
I am in the process of training my girlfriends to eat from my hand and its going pretty well. I have had him for about 3 weeks now and he has eaten from my hand twice. Key is, to go for a few days without feeding him, then give him frozen foods. Also, I noticed that the gar's are exceptional eaters when the lights are off....