How is a grilled cheese gluten free?
Chances are, you'll have to meal plan so you can use extra ingredients in multiple meals (like shredded chicken you use in tacos one night and soup the next night) or stuff you can freeze and pull out another night.
I'd start by browsing recipes you think will work for your family's needs, and then look at the ingredients and try and sort them out by ingredients you need. Does that make sense?