GX, Gx, or gx may refer to:
GXS (OpenText GXS) is a subsidiary of OpenText Corporation headquartered in Gaithersburg, Maryland, United States.
GxP is a general abbreviation for the "good practice" quality guidelines and regulations. The "x" stands for the various fields, including the pharmaceutical and food industries, for example good agricultural practice, or GAP.
Guangxi Beibu Gulf Airlines, or simply GX Airlines, is a Chinese airline based at Nanning Wuxu International Airport.
GXT was an Italian subscription-based comedy/entertainment television channel.
GXG Markets was a European Regulated Market which operated a securities market focusing on SME companies by operating a three-tier market structure with an OTC (Over-the-counter) segment called GXG First Quote (an information and trading platform for professional investors), a multilateral trading facility (MTF) called GXG Main Quote and a Regulated market called GXG Official List.
GX Jupitter-Larsen (sometimes erroneously spelled Juppiter-Larsen) is an artist, based in Hollywood, California, who has been active in a number of underground art scenes since the late 1970s.
GX Velorum (GX Vel) is a blue supergiant variable star in the constellation Vela. Its apparent magnitude is 5.0. It is an α Cygni pulsating variable.
GX was a design for an expendable launch system intended to compete in the commercial satellite launch sector.