It can be hard as you learn how to eat and cook gluten free. My brother has celiac disease and I have to refresh myself everytime I cook for him. The web sites that Laurie D suggested are great sites with great recipes, I may have to look at them as well. I also suggest joining the Celiac Disease Foundation. They have great information and resources. I think they are the group that also has a mostly comprehensive list of all "safe" products and manufacturers. Also, a few years ago the FDA (aka the government) passed a law that requires food manufacturers to put an allergy warning on their food labels. I am not sure but I think manufacturers have a couple more years to get it on their labels, but most have it now. It is usually located below the list of ingredients. It is a great resource but not always comprehensive. I have found that it reduces the amount of time I spend reading the labels. If wheat is in the list of allergens in the product, I can stop reading.
Another thing to think about is how sensitive your son is to gluten. If he is extra sensitive he should probably not eat stuff that has been processed in facilities that also process wheat.
Someone said something about getting lists of products that are gluten free from the stores you shop at, you can also get these lists from most of the places you eat out at. All you need to do is ask the waiter/cashier for it.
Also, as you cook for your son, you will need to think about what else you are cooking. If what you are cooking for yourself has wheat in it, you will need to use seperate utensils/pans for your sons food. Basically, watch out for cross contamination. (Like you do for raw meat.) In my brother's house that means there are two toasters.
Hope you get some more helpful information. What you already have is great! (sorry if this seems like rambling)