Green’s Dictionary of Slang

(drugs) a marijuana cigarette.

1938		in Meyer Berger ‘Tea for a Viper’ New Yorker 12 Mar.
1940		‘Jargon of Marihuana Addicts’ in AS XV:3 Oct. 336/2: The cigarettes are usually called reefers, but other names are: [...] gyves.
1953		Anslinger & Tompkins Traffic In Narcotics 309: gyve. A marihuana cigarette.
2001		ONDCP Street Terms 11: Gyve — Marijuana cigarette.