I have Celiac too and have missed pie since going on a gluten free diet. And as bad as I am at making regular pie crust, I'm going to attempt the GF pie crust recipe above.
As for the poster who suggested graham crackers or gingersnaps, that wouldn't work for someone who has to eat a GF diet because they both have wheat flour in them. It's why I had to stop making my key lime yogurt and Cool Whip pie with graham cracker crust. Mmm, yum, I can still taste it.