Preheat oven to 350 degrees. In the bowl of a stand mixer add both sugars, vegetable oil, and pumpkin then beat for 3 minutes on medium speed.
In a medium bowl, combine gluten free flour, baking powder, baking soda, salt, and pumpkin pie spice. Mix gently with a spoon.
Add eggs, one at a time to pumpkin mixture and beat on medium speed until thoroughly combined. Scrape the bowl with a spatula.
Add dry ingredients to pumpkin mixture and beat on medium speed until thoroughly combined.
Spray or line a muffin pan, and scoop batter ¾ of the way full in each one. You should get 10 to 12 cupcakes.
Bake cupcakes for 18 to 20 minutes or until the tops have risen and they bounce back when touched. You can also test with a toothpick.
For the frosting, beat 1 stick butter, ¾ cup powdered sugar and 1 tablespoon maple syrup on medium high for 2 minutes. Add ¾ cup powdered sugar, one tablespoon heavy cream, ⅛ teaspoon maple extract, and ¼ teaspoon cinnamon and beat 3 more minutes.
Finally add the last ½ cup powdered sugar and 1 tablespoon maple syrup and beat 2 more minutes.
Pipe or spread frosting onto completely cooled cupcakes, sprinkle with cinnamon and add a candy corn to the top of each one.