My mum has coeliac disease. She lives with my sister and family so for the most part, their whole family is gluten free by default. We eat there regularly and seriously it doesn't have to be a big change. If you cook your own dinners, from scratch, it is just a matter of using GF flour instead of regular for a lot of casserole type things and making sure you have GF stock. GF flours are readily available in Coles and Safeway/Woolworth stores. GF pasta is also readily available - just buy DS his own, cook it separately and cook regular for everyone else.

Mum's biggest challenge by far is breakfast. She doesn't really like cereal but says the GF cereals from Safeway/Woolies are pretty good. GF breads are mostly terrible, unless you invest in/have a bread maker and you could try your hand at making your own. Buckwheat pancakes are yumm. Mum also has a lot of eggs for brekkie but she misses a nice slice of toast to have with the eggs!

Lunches, well a bit similar. You'll definitely get a lot out of the coeliac society, so join up!

Good luck. It doesn't have to be the end of your culinary world And DS will be a thousand times happier/healthier!!