It's possible these days to purchase mixes for almost any baked product you want: gluten-free bread mixes, gluten-free muffin mixes, gluten-free pizza crust mixes, gluten-free cake mixes, gluten-free cookie mixes ... you name it.
This is another area where you must be sure to purchase only products marked "gluten-free," since if you don't, you'll almost certainly be purchasing something with gluten in it.
Baking Supplies: Many Are Gluten-Free, But Be Careful
To bake, you frequently need ingredients other than a gluten-free mix and of course, some people want to bake from scratch, without a mix.
It's possible to find gluten-free flour blends you can use for your baking projects, or you can use individual gluten-free flours. For example, Bisquick now produces a gluten-free baking mix. Companies such as Bob's Red Mill and Arrowhead Mills also package gluten-free flour products.
Just be certain to choose only those labeled "gluten-free" gluten contamination of flour products can be very bad, and you'll be safest sticking with brands that meet the FDA's gluten-free labeling requirements.
Ingredients such as yeast, baking powder and baking soda generally are gluten-free, but it doesn't hurt to check on specific manufacturers' products before you buy. In addition, the same rule should apply for cocoa, baking chocolate and other flavorings many are gluten-free, but double-check. When I need sugar, I use Domino Pure Cane Sugar, in the familiar yellow, navy and white package.