To make this Pumpkin Chocolate Chip Bread gluten free, replace the all-purpose flour with a high-quality 1:1 gluten-free baking flour blend that contains xanthan gum. Use certified gluten-free baking soda, spices, vanilla extract, pumpkin puree, and chocolate chips. Check all packaged ingredients for gluten cross-contamination. Gluten-free quick breads can be slightly more delicate, so allow the loaves to cool completely before slicing.