Has Gluten been Ruled Out among the Non-Suspected Pre-Made Items?

Has Gluten been ruled out as an ingredient in certain non-suspected Pre-made items such as pop corn, pop corn seasoning, potato chips, mints, bacon bits, condiments, candies, cold salads, desserts, cheesecakes and pre-portioned extras like ketchup, mayonnaise, mustard, tarter sauce, cocktail sauce etc.? (Why: It could be that the Chef uses the prescribed "Gluten-Free" brand of ketchup in cooking, but the little packages of ketchup given to customers on to go orders are not"Gluten-Free".)