GWI may refer to:Garden World Images, a horticultural image library Genesee & Wyoming, an American railroad Germanwings, a German airline GWI (company), an audience targeting company Golden West Invitational, an American college track and field meet Gui (food), Korean grilled dishes Gulf War illness GWI.net, an English telecommunications company Gwi language, native to Botswana Gwi people Gwich’in language, native to Canada and the United States