Hi!
I've googled about gluten free food in Kazakhstan. That's what I've found satu.kz/Produkty-bez-glyutena.html but I guess here you will have to buy stuff online.
And also we do have Interfood grocery store, they say they also have gluten free food, food for those with diabetes and etc. wikicity.kz/biz/interfood-1-almaty
But these websites and comments on them are in Russian, unfortunately.
Best,
N.