I don't know why I didn't see this thread before. I'm also gluten-free (out of necessity). The no dairy makes it a little more complicated but I am sure any of these ideas should work for you.

Things I snack on:
celery w/ peanut butter
red pepper strips w/ hummus
macadamias or peanuts
nuts with a fruit (ie: peanuts & cherries, hazelnuts & grapes)
avocado slices w/ lemon juice sprinkled on them
pepperoni chips (nuke for a minute or so, let cool & they turn crispy)
tomato slices grilled for 2 minutes
cucumbers w/ a little salt
soups (I freeze soups into 1 serving portions & thaw when needed in micro)
crispy pickles