Tablets already work via libinput in wayland Tablet support — libinput 1.19.2 documentation
For GIMP there is a protocol since 2014, archived here: wl_tablet specification draft and you can map the device and activate it in Input Devices, even if you have done that already in X11 Session, still not very reliable for work.
Also Dmitry from the Krita project has an old discussion here: http://lists.freedesktop.org/archives/wayland-devel/2014-June/015605.html and now is working, but wayland itself is not yet reliable enough on some systems.
1 Like