Okay finaly got it to work.
Extracted it again.
Applied patch from gog and not the patch from github.
Copied libs that are to new on the system from the steam folder into game folder.
I still want the libs to be provided with the game or by gog in an extra patch/file.
Please do it.
If you have steam isntalled you can copy the libs from:
to the game folder of the witcher where all the readmes are inside.
I needed to copy: libcurl.so.4 librtmp.so.0 libgnutls.so.26
I think the main problem is there are so many distros and maybe that prevents GOG from releasing a universal build.
I've got a better solution. We could create our own patch for each distro so everyone can simply download, extract and play, it's all a matter of using the right libraries depending on the distro.
There are plenty of people here using all kinds of distros, making these patches doesn't take long and will clear out a lot of confusion. I'll make a new thread about my idea soon.