Hi Kari, I got the recipe from one of those little Goodfood cookbooks specially for GF. The Victoria sponge recipe in there is good, too. And Absent's almond and orange cake is fabulous. 
It was 140 grams GF plain flour, pinch of salt, 2 eggs, 200 ml milk and 100 ml cold water. Made in the usual way but with an electric whisk (don't know why but it doesn't seem to work if I just use a fork). At this stage the batter looks very sorry for itself. Leave to stand for 30 mins by which time the batter is looking more like normal batter, then whisk in 50 grams of melted, unsalted butter. Cook as normal. Eat all of them 