In 1943, as part of the postwar plan for the company, Grumman started looking at entering the light aircraft market.

The first design was the G-63 Kitten I which was an all-metal two/three-seat cabin monoplane with a retractable tailwheel landing gear and powered by a Lycoming O-290 piston engine.

On 4 February 1946, a version with a retractable nosewheel landing gear and dual controls, the G-72 Kitten II was flown.

[1] The development project was terminated in 1946, and the Kitten II was used as a company transport until it was retired in the mid-1960s.

The sole surviving Kitten, it was restored and is now on display at the Cradle of Aviation Museum, Garden City, Long Island, New York.