Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large mixing bowl, combine the gluten-free flour, baking powder, and salt.
Add the cold, cubed butter to the flour mixture and use a pastry cutter or your fingers to work it in until the mixture resembles coarse crumbs.
Stir in the chopped pecans.
In a separate bowl, whisk together the maple syrup, milk, and vanilla extract.
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix.
Turn the dough out onto a lightly floured surface and shape it into a circle about 1 inch thick. Cut the circle into 8 wedges and place them on the prepared baking sheet.
Bake for 18-20 minutes, or until the scones are golden brown and a toothpick inserted into the center comes out clean.
Let the scones cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.