Actually, it does include oats. They don't have gluten themselves but oats are always stored, harvested, and processed with wheat and get contaminated with gluten. You can buy special
gluten-free oats that are grown, stored, and processed separate from wheat but they are very expensive.
If you do have gluten intolerance there are grains you can eat, but it is often good to avoid grains for the first six months to allow your digestive system to heal because the grains tend to be harder on your system. Some people avoid them altogether. My son has Celiac and I may have gluten-intolerance myself so we pretty much avoid wheat and oats at my house.