G-men (ジーメン, Jīmen) is a Japanese gay lifestyle brand, and formerly a monthly magazine.

G-men was designed to encourage steady readership by presenting a more well-defined fantasy image, and by running serialized, continuing manga stories (as opposed to the one-shot stories standard in other in gay men's magazines) which encouraged purchase of every issue.

G-men was also one of the first gay men's publishers to offer collections of manga bound into tankōbon.

Issues of G-men usually had approximately 300–500 pages, including several pages of glossy colour and some black and white photographs and drawings of hairy, sometimes bearded, muscular men in their 20s and 30s (these photographs are censored in accordance with Japan's rules; while they feature explicit depictions of sex, genitals—and most pubic hair—are obscured).

G-men had fewer general articles than other magazines such as Barazoku and more short fiction and serialized stories.