The manufacturer identification code (MIC) of your craft identification number (CIN or HIN) is GPO. This MIC (GPO) stands for the company name Glas-ply which is currently In Business. This boat manufacturer code has other company names (GPO sometimes goes by these name(s) if applicable: Caldwell Machinery Co., , , or ). This could happen if the US Coast Guard reissued the MIC to a new company after the first went out of business.
This company (Glas-ply) is owned by Jerry Caldwell and is located at 14822 Three Lakes Road in Snohomish state of Wa. It manufactured this vessel and placed your HIN or CIN on the hull. This Boat maker is not owned by a parent company. Glas-ply has started making boats, yachts or other watercraft as of 9/19/1990.
More details at the US Coast Guard.
The US Coast guard provides this comment about this watercraft manufacturer: Old Address Prior To 11/30/95: Po Box 17540, Seattle Wa Per Bsc Returned As Of 02/98 Is In Process Of Moving Mfg Facility. Address In Record Is Home Address. Building High Class Dinghys And Some Larger Fiberglass Vessels - All Composite, No Wood Used..