Using GTK+ with Wayland 3 GTK Library Using GTK+ with Wayland Wayland-specific aspects of using GTK+ The GDK Wayland backend provides support for running GTK+ applications under the Wayland display server. To run your application in this way, select the Wayland backend by setting GDK_BACKEND=wayland. Currently, the Wayland backend does not use any additional commandline options or environment variables. For up-to-date information about the current status of this backend, see the project page.