She became a unit of Division 34, Transport Squadron 12, and spent the ensuing weeks in amphibious warfare maneuvers in the Solomons.

From there she sailed to Hagushi Beach, Okinawa, where she joined in the initial assault 1 April 1945 conducted under cover of heavy naval gun and plane bombardment.

Here Gage embarked the men and equipment of an Army Air Corps Casuals and landed them at Manila, Luzon, Philippine Islands, 12 June 1945.

After embarking troops at Langemak and Humboldt Bays for transport to Iloilo, Panay Island, P.I., she steamed to San Francisco, Calif., where she arrived 2 August 1945.

Thirteen days later she departed with some 1,500 marines whom she landed late in October as part of the occupation forces at Hiro Wan, Honshū, Japan.

Gage departed Sasebo 26 June; embarked Army veterans in the Marianas and Hawaii; then transited the Panama Canal for Norfolk, arriving 29 July 1946.

Gage left the James River Reserve Fleet on 23 July 2009, and was towed to Brownsville, Texas, where she was scrapped by ESCO Marine, Inc.