The GJG was an American automobile manufactured from 1909 to 1914 by George John Grossman in White Plains, New York. It was assembled from imported components, which included a "Renault-type" 26 hp or 40 hp four-cylinder engine. The smaller-engined car was called the Junior, and the larger the Senior. The latter was available with either "Cruiser Torpedo", "Carryall" or "Pirate Runabout" bodywork.^{[clarification needed]}

Grossman closed the company in 1914 as he said it was no longer making money.

• Burgess-Wise, David (2000). The New Illustrated Encyclopedia of Automobiles. BookSales Inc; Rev Upd edition (May 2000). ISBN 0-7858-1106-0.^{[page needed]}