It's a throwing knife. As mentioned, GC Co is Gutmann Cutlery of Mt. Vernon Ny, active post WWII - 1990's as the original company. Late 90's it was sold to Shiraz Balolia, who owns the Grizzly Tool Company of Washington state. The Original Gutmann's claim to fame was being one of the first importers of Puma cutlery.
This knife is probably 50's - 70's. After that, the pattern would've probably been made in Japan to save costs. Also by the late 70's, early 80's, Gutmann usually wasn't using GC Co, and would've sold it under the "Edge Brand" label, which was another one of their brands.