If I want a delicious piece of pie I have one option, make it myself. Ordinary pies found in restaurants and grocery stores would definitely make me violently ill, they also usually are not vegan.
I'm not the most organized cook. I use recipes to construct an image in my head then start changing it to suit my needs.
There is a company that makes frozen gluten-free pie crust bottoms, I buy those and sort of punt making the filling and top crust. I'm also experimenting with different types of fruit. Yesterday I made a blueberry pie with fresh blueberries from Chile. I've made apple pie most often, from fresh apples, and also used mango and blackberries.
I hear people badmouthing pie quite often, as if it is junk food. I think it is not. The main ingredient in most pies, GF or not, is typically fruit. Eating fruit is quite good for us. I suppose one can add too much sugar, but IMHO I don't. I want the flavor of the fruit to take front stage. I've been using brown sugar and/or molasses for sweeteners as they include traces of nutrients and a slightly earthy flavor.
My pie crust has a history cluttered with failures. Wheat flour is naturally more cohesive in a dough than any gluten-free flour, and adding egg makes it more so. I'm using general purpose GF flour from either Krusteaz or Bob's Red Mill, combined with margarine softened in ice water. I use no egg and obviously no gluten.
I don't recall where I heard this tip, but it's brilliant; put the dough ball between two sheets of wax paper to roll it out. Your roller stays clean and so does your work surface. When it is time to separate the wax paper from the crust peel it slowly at nearly a 180 degree angle.
This morning instead of having a nut based energy bar for first breakfast I will certainly be having leftover blueberry pie.