my sister made a pumpkin pie the other day (it was raw, vegan, gf) and it only consisted of 2 ingredients!!
2. pecans! (the pie itself was of pumpkin and dates along with some cinnamon)
*she put the dates and pecans in a food processor and just pressed it down into the pan. it was delicious and a very unique touch to pie crust!
For a typical pie crust, there's gf graham crackers that you could crumble up and mix with earth balance butter perhaps