The Grumman light aircraft line was then acquired by Gulfstream in 1977, who completed a major redesign of the AA-1B, resulting in the AA-1C.
The Grumman light aircraft line was then acquired by Gulfstream Aerospace in 1977 who formed it into their light aircraft division, Gulfstream American. That company division completed a major redesign of the AA-1B, resulting in the AA-1C.