i have a fla spotted gar. they are sweet, you have the advise you need. i would advise every other day, or so, to ensure a healthy diet, but a diet as he wont get huge to quick. but goin a day or 2 without food wont hurt em, in the wild they will go a bit without food and lie and wait for food to come to them. so just get to know your fish, if you see him really active, hes hungry and prolly looking for food, mine personally, i feed him every 2-3 days,ill drop in 7-10 guppies depending on thier size maybe a lil more, and let him snack until they all gone, then ill pop more in 2-3 days after i see the last one has been ate.
and my fish is doing well and growing still, so i know hes also getting enuff to eat. but hes not growin quick. but hes doing well.
him being that small, some nice tank mates would be an adult guraomi( how ever its spelled) a school of barp (tinfoil barp) Large. something twice the size of his mouth a pleco, cats, something thats bigger than its mouth an faster than the gar.
enjoy, id like a pic or 2. ill have some soon