It is either G. graphurus or a G. glabrous. most likely a G. glabrous, as Dr. Roy said that they are far more common. I have one almost exactly like that one, though he is now a slightly darker green (He molted 2 days ago).
great mantis, mine is very interactive, he comes out when I tap the tank and follows my finger around. He is also a very ferocious hunter-killer. those poor fiddler crabs...
-Ron