Green’s Dictionary of Slang

(US) a man, a fellow.

1922		E. Hemingway letter 20 Mar. in Baker Sel. Letters (1981) 64: Show the Ghee the screed.
1939		Herbert & Spencer Jitterbug Jamboree Song Book 32: ghee: a fellow, man, guy.
1950		Goldin et al. DAUL 80/1: Ghee. (‘G’ pronounced as in ‘guy’) A person; a guy.
1979		E. Torres After Hours 5: He was one of six Mafia ghees in my conspiracy trial.