Yup. GN were widely known for their removal of material from the back of the bat.
GN100 Scoop, also known as the bat with no middle, the GN500 with it's 4 scoops, the Twin Scoop, the Megapower with it's 2 low scoops, the Dynadrive with it's larger longer scoops like the Twin and most recently, the Xiphos... All with some interesting scoopage going on.
Some might argue that the Powerspot was also an innovation - a tradionally shaped bat that for some reason had no middle.