Add the toasted coconut flakes to a large bowl, add the coconut oil, maple syrup, salt, egg, and vanilla and mix until combined. Add the GF flour and baking soda and mix until well combined. Scoop 1 tbsp-sized balls onto a parchment-lined baking sheet, press the back of a tbsp into the center of the ball, and shape the dough to form a little pool to hold the caramel. Repeat with all the dough balls and place them on the lined baking tray (the cookies don't spread so you can place them close together). Bake for 8 minutes.