I love to get a 12 piece grilled nuggets with fries.
A note on some of the comments: Most of us know you often have to do your own research and the employees working the drive thru may not always know the answers to questions about allergens - pasted below is the GF menu that is literally two taps away if you follow the link, here for convenience.
Entree
Chick-fil-A® Grilled Chicken Filet (no bun)
Chick-fil-A® Grilled Market Salad*
Grilled Chick-fil-A® Nuggets (8 or 12 count)
Sides
Fruit Cup
Side Salad*
Superfood Side
Chick-fil-A Waffle Potato Fries®
Yogurt Parfait*
Breakfast
Bacon slice
Grilled Breakfast Filet
Sausage patty
Hash Browns
Kid's Meals
Grilled Chick-fil-A® Nuggets (4 or 6 count)
Buddy Fruits® Pure Blended Fruit To Go applesauce
Honest Kids® Apple Juice
Beverages
All Beverages
Dipping Sauces and Dressings
Honey Mustard Sauce
Honey Roasted BBQ Sauce
Polynesian Sauce
Garlic & Herb Ranch Sauce
Zesty Buffalo Sauce
Chick-fil-A® Sauce
Smokehouse BBQ Sauce
Chick-fil-A® Buffalo Sauce
Avocado Lime Ranch Dressing
Zesty Apple Cider Dressing
Light Italian Dressing
Fat Free Dijon Honey Mustard Dressing
Light Balsamic Vinaigrette
Garlic & Herb Ranch
Creamy Salsa
Chili Lime Vinaigrette
* Does not include toppings