I fillet them like I would any other fish. They do have a larger ribcage to go around if you are one to fillet out all the bones like I am.
I've never tried cooking them whole. I assume you gill and gut them Kurt. I might have to try that.
I do know that if I know I plan to grille them, I leave the skin on and once it is ready to flip, I scoop the meat right out of the skin as it loosens up and it makes for a clean flip.