Could be an interesting mix, yes.... but keep an eye on the gar b/c he will probably try to eat the pbass. My little Florida I had used to love feeders. I know 2" pbass look like feeders....
they have 2 floridas but they are already huge, kind of felt bad they had them in a 55g but i wa shoping with the 5" alligator he woudl get used to the pbass(2") and maybe not eat them.
Pbass grow fast (mine went from 2" to 7" in about 4 months), but I think gators grow faster, and is most likely going to see them as food at some point, and sooner rather than later.