General Aluminum Manufacturing (GAMCO) - Aluminum Manufacturing aluminum, aluminum castings, high pressure die casting, permanent mold, semi permanent mold, lost foam, gravity poured permanent mold, steering knuckles, control arms, engine manifolds, oil pans, brake master cylinders, steering racks, safety critical, pressure test, leak test, oil pump, water pump, air tight, low porosity, ts certified, financially stable, channel plates, machining, brackets, transmission components, 0 ppm, engine cradle, electric power steering General Aluminum Manufacturing Company (GAMCO) was founded in 1943. Today, we are part of Park Ohio Holdings Corporation, a publicly traded company under the NASDAQ symbol PKOH.