GWG is a three letter acronym that can stand for:
Girls with guns Game-winning goal, in sports Global warming gases (greenhouse gases) Geometry Wars: Galaxies, a 2007 shoot 'em up video game Organizations Goodwill Games (Olympic style games started during the Cold War) The former Garden Writers' Guild (renamed the Garden Media Guild in late 2007), a British trade association for garden writers, photographers and broadcasters Great Western Garment Co.