controlling interest in the station (51%). References Michiguide.com - WGDN History FCC History Cards - WGDN Broadcasting and Cable Yearbook - 1974 Broadcasting and Cable Yearbook - 1988 Broadcasting and Cable Yearbook - 1989 Broadcasting and Cable Yearbook - 1992 Broadcasting and Cable Yearbook - 1994 Broadcasting and Cable Yearbook - 1998 Broadcasting and Cable Yearbook - 2001 Broadcasting and Cable Yearbook - 2005 External links GDN (AM) Radio stations established in 1974 GDN 1974 establishments in Michigan