It's called a quilling technique, if you are looking for videos or tutes. But basically its based on paper quilling. You cut your gumpaste into thin strips and assemble it into the final shapes you want placed on you cake. Then allow it to dry, before applying to the cake. Hope this helps!
Thanks! I never thought to do it that way, I've done quilling with paper, but never thought to do it on a cake. I read just after I posted this in a wilton book to use a large round tip with royal icing, let it sit, and continue getting smaller with the tips and adding on top if it'll be on the cake