We arent just GF but some of what we have found related to the gluten side is;

Breakfast - Freedom Foods have a rice bubbles that contain less or on par sugar to the big brand counterpart. Otherwise we just use the cerals we can find in the health food isle being either norganic or freedom foods brand and whatever he will eat. You could also try GF yougurt with fruit (though we keep this as our lunch/snack reserve lol).

Bread - My eldest likes the Orgran wholemeal bread mix (no need for a bread maker for that one). A friend also uses a different brand one that she also just oven bakes that's apparently quite nice, not sure of the brand as we are also limited by soy and we just had the discussion that hers contains soy lol. As a treat I also make Macro brand banana bread which is actually quite nice. We havent resorted to a bread maker yet but then Im not limited for time or anything either.

Lunches - For school we make savoury muffins with gluten free flour etc, they seem to be a hit and you can tweak them to most things. We also take advantage of fresh fruit and vegies where we can, carrot sticks etc with yougurt. When he will eat them we also have rice cakes as a bread alternative. Otherwise I make some bread and he can take a sandwich like everyone else. We started young though so he doesnt really know what fluffy white bread is like lol!!