We went to Gatorland in Feb., and it was a lot of fun. Don't go in expecting a theme park--more like a private reptile zoo, if that makes sense. you won't be there for more then 4 hours, if that, so figure it for a down day, or maybe go there, then go shopping after.
While it's nowhere near a theme park in scope, it's educational and different. The best I can say is, try it once, if it's not for you, at least you know.
P.S. They do mention that they're a gator farm, too, so it's kind of like visiting and farm, where the animals are there to provide sustenance and income.