OP you may find the up side of this is that you eat more healthily and stay slim! As I said earlier, I first experimented with gluten and dairy free (under a top prof of immunology) in the 1980s. I didn't see a huge difference in my symptoms but some years later tried again after being pretty sure that my bowels were being affected by gluten (not so much dairy.)
As far as I know, blood tests are not that accurate for intolerance. His approach was stone age/ elimination diet then challenge (as Beta Dad has said.)
So...when I first tried gluten/dairy free it was very hard- nothing available.
Consequently, I pretty much gave up all cake, biscuits, puddings ( and chocolate as it contains caffeine which doesn't help me) and stayed very slim. I've lost much of my sweet tooth. yes you can buy commercial products - cakes etc- but it's just as easy to make your own using Doves flour. I find that adding ground almonds and a touch of Xanthan gum as part of the flour quantity gives a moister and denser cake.
As others have said, avoid chips or 'fries' unless you know what they are because so many have a batter coating.
It really depends on how sensitive you are to gluten. I can eat a piece of 'normal' cake with no ill effects but if I was to do it every day, or eat bowls of pasta or loads of bread, I am sure my symptoms would gradually return.
TBH if you are going to put young children onto the same gluten free diet, I'd check with a dietitian (this is standard medical advice.) Wheat contains a lot of B vitamins and children can suffer if these aren't made up in the diet. Have a look at www.wisediet.co.uk for a dietitian who deals in allergies, intolerances and IBS.