Preheat oven to 350. Lightly coat a 9x5" loaf pan with nonstick spray.
In a mixing bowl whisk together the gluten-free flour, baking soda, baking powder, salt, and spices.
In a separate bowl whisk together the eggs, pumpkin purée, and sugar. Next, stream in oil, whisking continuously until the mixture is homogeneous. Switch to a wooden spoon or spatula and gently fold in the dry ingredients, stir until combined but do not over mix.
Pour the batter into the prepared pan; smooth the top with a spatula. Stir together the remaining 2tbsp and 1tsp cinnamon. Sprinkle the pumpkin seeds and the cinnamon-sugar mixture over the batter.
Bake the bread, until a tester inserted into the center comes out clean, about 70 minutes.
Let cool completely before serving!