<<Disclaimer: Verify this information before applying it to your situation.>>

Trader Joe's has a website from which you can browse or DL  a list of
all the gluten free products their stores carry (separate lists for
East  and West Coasts).   TraderJoes has many bargain prices.  My life
has been enriched since they opened up last year in Virginia (with a
Fresh Fields right across the road for pricier things).   My printout of
TJ's East Coast list in what appears to be 16-point type ran 12 pages.
They run the usual caveat about GF only when last checked and that
products may change.