I know this question comes up a lot, and I've seen some answers.
But the thing is, from what I understand numlockx is made for Xorg and does not work on Wayland.
I saw that some implementations of Wayland like Weston have a config file where I can chose the default behavior for numlock. But I haven't been able to find anything similar for the Gnome Shell implementation on Ubuntu 17.10
Also, I have numlock ON on my UEFI, and it is on during GRUB, but after I start Ubuntu it is switched off.
How can I manage to set this behavior without having to change to Xorg?