GSC Systems, founded in 1984, is a Canadian manufacturer of wooden propellers for homebuilt and ultralight aircraft.

The company headquarters is located in Vernon, British Columbia.

Originally producing fixed pitch wooden propellers, the company expanded into ground adjustable designs and more recently introducing the GSC-GTA, a mechanical, inflight-adjustable propeller.

Their propeller blades are all made from eastern maple hardwood.

[1][2] Originally called GSC Systems International Ltd., the company is now officially GSC Systems (2004) Ltd.[1][2]