gdk-window-deiconify (window)

window -- a toplevel gdk-window object

Attempt to deiconify (unminimize) window. On X11 the window manager may choose to ignore the request to deiconify. When using GTK, use the function gtk-window-deiconify instead of the gdk-window variant. Or better yet, you probably want to use the function gtk-window-present, which raises the window, focuses it, unminimizes it, and puts it on the current desktop.