Gummo Marx nasceu o 23 de outubro de 1892 em Nova Iorque, Nova Iorque, EUA. Foi casado com Helen von Tilzer. Morreu o 21 de abril de 1977 em Palm Springs, Califórnia, EUA.
He left The Marx Brothers just when they were reaching popularity because he felt
he lacked the performing skills of his brothers. He joined the military
instead to help with the war and was replaced by his younger
brother.