Apparently Sharkeys has gluten free buns now! Not on the menu yet but after ordering takeout and putting "no bun, gluten free" in the instructions box, my burger had a bun on it. Called the restaurant to find out what the heck and they said they have GF buns! I made my husband sample the bun and he said it was definitely different than his bun so went ahead and ate it. No issues so far!
No GF menu and limited selection of GF foods, but my waitress was WONDERFUL and worked with me (running back and forth to the kitchen to ask questions) to find something I could eat safely.