How about hard cooked eggs? I do lots of cottage cheese and fruit. As for granola, I love the Nature's Path GF ones, and the Udi's is good, but I won't buy it, as I can make it cheaper. Can you eat Greek yogurt? Many who have problems with dairy can eat that, as it is cultured.
I also do lots of quinoa, with whatever I have tossed in. I agree that you need to schedule at least a bit of time, or you will be more tempted to cheat. Not good!
There are some quite good protein bars. Check a health food store, or even some grocery stores. I can't eat lots of seeds or any peanut butter, but if you can, several are GF Also, there are soy milk shakes, which you could keep in a cooler bag.
Sorry; I do rely a fair amount on dairy, and my fave Nature's Path Mesa Sunrise cereal, but I work from home. I spend far too much time at the computer, sometimes getting tons done, and other times not. :)
Good luck, and keep persevering.
"It is only with the heart that one sees rightly; what is essential is invisible to the eye."
Antoine de Saint Exupery: The Little Prince
"To the world you may be one person, but to one person you may be the world."