Preheat the oven to 375 degrees and grease a muffin tin. Use cupcake liners if desired.
In a medium bowl, mix together the gluten-free flour, baking soda, salt, cinnamon, and ginger. Sift or whisk the flour mixture to combine evenly.
In a large bowl, stir together the eggs, sugar, oil, oat milk, and pumpkin puree. Add the dry ingredients, and stir to just combine. Stir in the chocolate chips.
Divide the batter into 12 muffins in the prepared muffin tin. Bake for about 20 minutes, or until a toothpick inserted in the center of a muffin comes out clean. Remove the muffins from the pan onto a wire rack to cool completely. Store in an airtight container for up to 3 days, or freeze for later.