I don't have any food allergies but my boyfriend has celiac. Often when we go to cafes together, he has to watch sadly while I scarf down baked goods.
To be a good sport I took him to Organic Oven. It is a nice welcoming place. The coffee was really good. There is a wide selection of gluten free products. They even serve sandwiches made from gluten free bread.
I had a pumpkin muffin and it was very tasty and could hold up against a "normie" muffin.
Weirdly they are closed on Saturdays.