In a large bowl, whisk together the gluten-free flour, salt, and baking powder.
Add the warm water and oil to the dry ingredients. Stir until a shaggy dough forms.
Turn the dough out onto a lightly floured surface and knead for 2-3 minutes, until smooth.
Divide the dough into 6 equal portions. Roll each portion into a thin circle (about 6 inches in diameter).
Heat a lightly oiled griddle or large skillet over medium heat. Cook the tortillas for 1-2 minutes per side, or until lightly browned and cooked through.
Notes
Store leftover tortillas in an airtight container at room temperature for up to 3 days, or freeze for longer storage.