Each weekend I give myself free rein to eat gluten-free desserts. I don't find that eating sugar upsets my stomach at all, which makes sense because most sugar is digested in the small intestine before it gets into the fermentation chambers of the lower intestine. But really, having some treats once in awhile makes it way easier for me to comply with this diet on a day to day basis. Never having bread again doesn't seem so bad in a world of delicious ice cream.
My rules for treats are