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.