G-MAN is a graphic novel written and drawn by Chris Giarrusso. The first volume, Learning to Fly, was published in 2009 by Image Comics. The second novel, Cape Crisis, was published in 2010. Giarrusso has said he is currently working on a third volume. The character G-MAN previously made small appearances in the Savage Dragon series.

G-Man (plural G-Men) may mean:

• G-Man (slang), short for "Government Man", slang for agents of the Federal Bureau of Investigation and similar organizations
• G-Man (Half-Life), a character in the Half-Life computer game series who is dressed like a government official
• G-Man, a comic written by Chris Giarrusso
• Monty Sopp (born 1963), a professional wrestler known also as "The G-Man"
• G. Gordon Liddy, nicknamed G-Man on his radio show
• g-man (British artist), minimal techno artist Gez Varley
• Gerald McClellan, a former American boxer nicknamed "G-Man"
• G-Men, a reference to a detectives of the Dublin Metropolitan Police force's "G" Division in early-20th-century Ireland
• G Men, a 1935 Hollywood crime film
• G-Men, the original name of 1960s Australian band The Pleazers
• G-Men, a nickname for the New York Giants, a National Football League team
• G-men (magazine), a monthly Japanese magazine for gay men
• Gideon "G-Man" Graves, character from the Scott Pilgrim graphic novel series and movie
• G-Man (album), a live album by jazz saxophonist Sonny Rollins.