Whatever you call them, they are delicate and melt-in-your-mouth yummy.  Be sure to take note of the slight modification from traditional shortbread with the inclusion of either egg yolk or moistened flax.  GF flour doesn't have quite enough oomph to hold together without a little help.  Fortunately, in taste and texture, I don't think you will notice the difference--rolled in powdered sugar, they are simply mouth-wateringly good!