Another app for iPhone (maybe others, I'm not sure) is 'Find Me Gluten Free'. You can search restaurants by popular chains, by address, those close by, etc. for ones that offer gluten free options and the menu/list of choices that are GF. It also has a 'dining card' section to show to servers/chefs that clearly states what celiac is, what they cannot eat, and lists items specific to certain cuisines that cannot be consumed (ie Mexican/South American foods listed include flour tortillas , bread, battered foods, fried ice cream, churros, beer). It also contains lists of items by cuisine that celiacs must be cautious about, and items that are "safe". I believe it was free.
DH eats a lot of rice/cinnamon/chocolate/honey nut Chex cereals, for snacks as well as breakfast. Other snacks include nuts, Blue Diamond Nut Thins and Nut Chips, fruits, veggies and dip, cheese curls, tortilla chips, and Crunchmaster crackers. Desserts are tricky because he has a bad reaction to more than tiny amounts of xantham gum, which is added to so many GF baking mixes to add elasticity. I've found some GF brownies that use almond meal that he loves, so I make those for him. I've found a lot of GF recipes on Pinterest, along with a long list of GF baking mixes to make, but I haven't tried many of them yet. A PP mentioned GF burger buns at Red Robin restaurants. Our local RR manager told DH he could call the restaurant 24 hrs in advance and order as many buns as he wanted. When I get more space in the freezer I will order a dozen and just freeze them. The best pasta DH has found is Schar. It's actually made in Italy I believe.
OP, where are you from? Here in PA we have Giant, Weis and Wegmans grocery stores that have dedicated GF sections to shop in (some are bigger than others).