The manufacturer identification code (MIC) of your craft identification number (CIN or HIN) is RGP. This MIC (RGP) stands for the company name Gilman Mld Prods, Rive which is currently Out of Business. This boat manufacturer code has other company names (RGP sometimes goes by these name(s) if applicable: Rivers-gilman Mould Pr, , , 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 (Gilman Mld Prods, Rive) is owned by Rivers,jim and is located at Po Box 206 in Hampden state of Me. It manufactured this vessel and placed your HIN or CIN on the hull. This Boat maker is not owned by a parent company. Gilman Mld Prods, Rive has started making boats, yachts or other watercraft as of 9/1/1972 and went out of business on (12/13/1985) in the following country: USA.
More details at the US Coast Guard.