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

Thanks to all those who responded.  We all know that McCormick/Schilling
individual spices and herbs are GF and most people suggested them.  Some
also suggested McCormick Blends and Medleys while others weren't sure if
McCormick mix spices were GF so please look at the labels.  Here are the
other suggestions in order of popularity in the responses:

Lawry's Seasoning Salt
Mrs. Dash
McCormick Medleys
Old Bay
Lawry's Garlic Salt
garlic/garlic powder in general
Lea & Perrins Worcestershire sauce
Penzeys spices 1-800-741-7787
ginger
lemon/limes
onion powder
fresh herbs
Morton & Basset
Cajun's choice
Morton's Nature Seasonings
Allegro Marinade
Sweet Baby Ray's BBQ sauce
Mr. Spice sauces
Durkee Grill Creation Marinade mix
Tones

Enjoy and fire up that grill this weekend!

Tom in CA