I bought some GF shortcrust pastry but thought it was tough.
My recipe for sweet shortcrust (enough for 1 doz mince pies) is 200grms GF plain flour, 1/2 tspn xantham gum, pinch salt, 50grms lard, 50grms block margarine, 1 med egg, 1 tbspn sugar and approx. 2 tbspns cold water.
Rub the fat into the flour, salt and xantham gum until it resembles breadcrumbs, add the sugar, stir in the beaten egg then carefully add the water as you don't want the dough too wet or it will be tough.
It rolls out easily if you don't overwork it.
I'm making a batch this afternoon for the freezer and a large GF panettone which should be big enough to share with DD and DGS who is coeliac.