There are some companies that make it almost easy to be gluten free (okay, that was an exaggeration). They have their products clearly marked GLUTEN FREE and/or their websites offer nice, clear allergen information. Two such companies are Heinz and Kraft.
Heinz's site http://www.heinz.com/health--wellness/focus-foods/dietary-preferences/gluten-free.aspx has an easy-to-read list of all its products and whether or not they are GF.
Kraft's site offers a Gluten Free fact sheet at http://www.kraftfoodservice.com/healthy_living/gluten_free_0623031.pdf and a list of their GF products, followed by some GF recipes http://126.96.36.199/kraftKitchens/index.cfm?Page=glutenFree .
Creamy Lime Tart