Preheat the oven to 350ºF. Line an 8x4-inch loaf pan with parchment paper and then spray the paper with gluten-free nonstick cooking spray.
In a large mixing bowl, beat together the pumpkin puree, ¼ cup almond milk, the coconut oil, egg, and vanilla until smooth. Add the sugar and beat until combined.
Add the flours, baking powder, baking soda, and spices, and stir together until well incorporated. If the mixture seems too dry, stir in 1-2 tablespoons more milk, as needed. Fold in the add-ins, if using.
Transfer the dough to the prepared pan. Sprinkle with a little extra sugar and cinnamon. Bake on the center rack for 55-65 minutes, until a toothpick inserted into the center comes out clean.
Let cool for 5 minutes in the pan then transfer to a wire rack to cool completely. Slice and serve.