How about legumes, vegetables, fruits, wild salmon, organic chicken, gluten-free/spelt bread and pasta, almond and rice milk?...you need to shop in a health food store like Whole Foods or Economy Nutrition where you can find more gluten-free items.
You might want to verify if the soy he is allergic to is the genetically modified version. Most people who have allergies to soy are allergic to GMO soy, not organic soy.
For recipe ideas check out vegan cookbooks like "La Dolce Vegan" or "Planet Vegan". You might want to join Whole Food's "Gluten Free" group that meets monthly. Call the store for more info.
Hope that helps :)
~G. G.
Certifed Health Coach and mom to two girls, 4 and 17 months