Departing Hollandia, New Guinea, on 12 October 1944, Gallup was part of the screen for the task force which mounted the invasion of Leyte in the Philippine Islands.

On 17 October 1944, she shelled the beach area of Dinagat, and the next day she swept the channel into Leyte Gulf as U.S. forces poised for the invasion.

She performed these duties, most of the time in gusty, stormy weather, with her sister ship Bisbee and the large infantry landing craft LCI(L)-343 and LCI(L)-344, before being sent on an escort mission to Humboldt Bay, New Guinea, on 28 November 1944, touching San Pedro Bay in the Philippines, Kossol Roads in the Palau Islands, and Manus in the Admiralty Islands en route.

[6] In February 1946, the United States began negotiations for the return of ships loaned to the Soviet Union for use during World War II.

[7] Reverting to her original name, Gallup lay idle in the Pacific Reserve Fleet at Yokosuka until recommissioned on 18 October 1950 for service in the Korean War.

Gallup continued to operate out of Sasebo, making escort, patrol, and guide tours to Pusan, Wonsan, and Chongjin, Korea, and to Sangley Point and Subic Bay on Luzon in the Philippine Islands.

Gallup was decommissioned and transferred under the Military Defense Assistance Program along with her sister ship Glendale to Thailand at Yokosuka on 29 October 1951, and served thereafter in the Royal Thai Navy as HTMS Prasae (PF 2).