Don't call yourself gluten free if you tell someone they can avoid the bread or avoid the fry batter. Use coconut flour for fried food and buy a gluten free loaf of bread at Bam Bam Bakery or the baked goods at Portland Food Co op. Slice it and put it in your freezer if this ends up being a low demand item. (thaw or toast when needed) Both places offer gluten free burger rolls too. All it would take is a small amount of freezer space and your GF customers would be fed a similar offering without going without.