actually i did think crocodile gar when i saw the pics, but i'm no gar expert. adult gars are easy enough to tell, well except for florida and spotted, but when it comes to juvies, most of the time i have no idea.
anyway crocodile gar can be used to refer to hybrid. of course im not saying thats what yours is because i don't know. anyway check out the following hybrid between gator and either florida or spotted
http://www.primitivefish.com/Crocodile%20Gar%20Type%20II.htm
EDIT: on 2nd look, i guess its probably more likely that its florida or spotted rather than a gator hybrid looking at the snout.