To construct a gluten-free version of this recipe you can substitute regular all-purpose flour with gluten-free all-purpose flour. It's also important to make sure that the oats you use are certified gluten-free as some oats might have come into contact, with gluten during processing. By making these adjustments people, with gluten sensitivities or allergies can savor these Homemade Oatmeal Cream Pies without worrying about any gluten-related issues.