Porridge should be made from oats. Oats don't contain gluten. The gluten-free label is just informative, it's normal porridge. Maybe shit, but just porridge.
Oats are milled in the same mills as wheat, barley and rye and are contaminated with gluten because of that. Ceoliacs have to ensure they eat oats milled in non-contaminated mills to be safe.
Porridge should be made from oats. Oats don't contain gluten. The gluten-free label is just informative, it's normal porridge. Maybe shit, but just porridge.