However, recently Gorn rebels have appeared and there are hints here and there that the Gorn Hegemony, currently a vassal state to the Klingons (King Slathis has a non-voting seat in the High Council) might attempt to break away sometime. (I hope so. I always thought the Gorn would make terrific Federation allies.)
Except seeing as the current Gorn ruler is interested in requiring the Gorn's ancient territory which has been said to cover a decent chunk of the federation that's got about the same chance as ice skating happening in hell.