GWI

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