GNOME applications are not shown in wmctrl -lx output on Wayland

[Norbert]

Steps to reproduce:
1. Install Ubuntu 17.10
2. Login to the default Ubuntu session
3. Launch gnome-terminal, gnome-calculator, gnome-calendar etc.
4. Install wmctrl and use it from terminal with `wmctrl -lx`

Expected results:
wmctrl shows list of windows

Actual results:
wmctrl do not show list of windows

Note:
inspired by AskUbuntu question - https://askubuntu.com/q/967565/66509 .

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-terminal 3.24.2-0ubuntu4
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Oct 22 15:21:23 2017
InstallationDate: Installed on 2017-10-21 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
SourcePackage: gnome-terminal
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

This is correct, as far as I know.

wmctrl is for X window management whereas GNOME/GTK and some other apps are native Wayland not using X. Only legacy apps using Xwayland will show up in wmctrl. Although you could ask wmctrl for some kind of enhancement to list the non-X apps.