Preheat & Prep. To start, preheat your oven to 400 degrees F. Line a 12-cup muffin tin with parchment paper liners or lightly grease the pan.
Combine The Dry Ingredients. In a large bowl, combine the cornmeal, gluten-free flour, baking powder, cinnamon and salt. Whisk to combine.
Add The Wet Ingredients. Next, whisk in the pumpkin, milk, eggs, syrup, and oil. Stir until just combined and no dry clumps remain.
Scoop & Bake. Then, scoop the muffin batter into the muffin pan. Bake in preheated oven 17-20 minutes, or until just cooked through. (A toothpick inserted in the center of a muffin should come out clean with just a few moist crumbs.)
Serve & Store. Allow to cool slightly, then serve warm! Store leftover muffins in an airtight container at room temperature 2-3 days, or freeze up to 2 months.