A gluten free emergency supply should contain everything that a normal emergency food supply does minus the gluten. This means that you should still store enough fruits, vegetables, protein, and calories to last your family during an emergency, often starting with a 72 hour food kit. The only real difference in a gluten free emergency supply is that the entrees, which provide a majority of the calories in your food stock, should all be gluten free options. Even things like powdered eggs and freeze dried fruit are great options to keep on hand.