I've been gluten free for a few months now, on advice from my doctor. It's been pretty easy because I'm used to cooking wheat and milk free for my daughter who has severe food allergies.
Gluten free is not "life without grains". We eat alot of rice and I've learned to cook it in many variations: Sushi rice, spanish rice, biryani. Plus there are some good rice noodles and rice pastas available, rice waffles, pancakes, brownies. I bake using rice flour and my boys, who can eat wheat ,don't notice: cakes, muffins and cookies. So it hasn't been a huge change for us.
The other thing we eat more of is potatoes, as a starch with dinner. And although there is a little gluten in oats, I eat oatmeal or homemade granola for breakfast every morning. There are commercial breakfast cereals without wheat, too. Some brands of Cheerios, Rice Krispies, Rice Chex. And you can have corn tortillas instead of wheat. The rice tortillas I've tried have been pitiful.
Frankly, I haven't noticed an improvement in my health from going gluten free. But it was worth a try because of my many allergies and auto-immune issues. And now I'm so accustomed to eating this way that I don't miss having wheat.