To make this Pepperoni Bread Pizza gluten-free, use certified gluten-free bread dough or gluten-free pizza dough in place of regular frozen bread dough. Replace the all-purpose flour with a gluten-free flour blend for rolling. Confirm that the pepperoni, mozzarella cheese, butter, and any dipping sauces are certified gluten-free, as some processed meats and sauces may contain gluten-based additives or cross-contamination risks.