Written and first recorded by Johnny Mercer (US #13/R&B #1 1943).
Other ht version by Louis Jordan & His Tympany Five (US #1/R&B #1 1944).
From the wiki: “”G.I. Jive” is a 1944 song written and originally performed by Johnny Mercer. Mercer intended to write a song that the soldiers on the battlefields of Europe and the Pacific would like. ‘G.I. Jive’ proved to be the biggest hit of all the war songs during World War II (1939-1945) dealing with soldier life.
“Recorded first by Mercer in late 1943, ‘G.I. Jive’ was a hit … twice … in 1944 by two different performers: Mercer’s recording hit #1 on the Harlem Hit Parade for one week in January, and peaked at #13 on the pop charts. Six months later, Louis Jordan & His Tympany Five also made it to #1 with “G.I. Jive” on the Harlem Hit Parade for a total of five weeks AND hit #1 for three weeks on the Billboard ‘Most Played Juke Box Records’ national pop chart. Jordan’s B-side, “Is You Is or Is You Ain’t My Baby”, was also a charting success for the group.”