G-line (disambiguation)

A G-line in Internet Relay Chat refers to a global network ban applied to a user.

G-line may also refer to:
 * G (New York City Subway service)
 * G Line (Los Angeles Metro), a bus rapid transit line in Los Angeles County, California
 * G (Los Angeles Railway), former streetcar service
 * G Line (RTD), commuter rail line serving Denver, Colorado
 * Goubau line, a single-wire transmission line or waveguide
 * The peak at 435.8 nm on the emission spectrum of mercury. See.
 * Metro G Line (Minnesota), a planned bus rapid transit line in Minneapolis–Saint Paul, Minnesota