Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9x5-inch loaf pan or line it with parchment paper.
Mix Wet Ingredients: In a large bowl, whisk together the canned pumpkin puree, eggs, both sugars, vegetable oil, and vanilla extract until smooth.
Combine Dry Ingredients: In a separate medium bowl, sift together the gluten-free flour, pumpkin spice, baking powder, baking soda, and salt.
Mix Wet and Dry Ingredients: Gradually add the dry ingredients into the wet ingredients, stirring until just combined. Be careful not to overmix. Pour into Pan: Pour the batter into the prepared loaf pan and smooth the top with a spatula.
Bake: Place the pan in the preheated oven and bake for 55-65 minutes, or until a toothpick inserted into the center comes out clean.
Cool: Allow the bread to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
Serve: Slice and serve once cooled. Enjoy!