x2.The best tank mates for gator gar is other gator gar
Other gars may work if they're reasonably large, but it's still a risk.
x2.The best tank mates for gator gar is other gator gar
-other than what Lepisosteus platyrhincus and Wiggles have posted, this thread has the worst information on tankmates for alligator gars (or really any gars). the OP should NOT be keeping a gator with any of his current tankmates, and sunfishes, basses, etc are NOT good tankmates for gator gars (nor are bullhead catfishes).
you can keep gators with other gators in large setups or temporarily in step-wise progression of small to large setups; along the way you can temporarily keep them with some other (bigger individual) species of gars, but that's about it. the question was obviously posed before doing any research or even forum research on keeping these fish. read through some other threads first!--
--solomon