[samtoday]

I just launched Inkscape, and noticed the port seems to be done! In Fedora 26, they ship Inkscape 0.92 which uses Gtk+ 3.

[mc-]

0.92.x does not use gtk3 (there is an experimental compile flag to use it, but it's still experimental)

[audidude]

You're both right. Fedora enables this option on F26.

rpm -qa | grep inkscape

inkscape-0.92.1-4.20170510bzr15686.fc26.x86_64

ldd /usr/bin/inkscape | grep gtk

libgtkmm-3.0.so.1 => /lib64/libgtkmm-3.0.so.1 (0x00007f12a6a2f000)

libgtk-3.so.0 => /lib64/libgtk-3.so.0 (0x00007f12a4dbb000)