Just to be clear, this isn't my project, but it has been working fine for me for awhile now, but I am probably not exercising the same pathways as you. Anyway, I have written additional bindings for the Gtk Docking Library and the Syntax Highlighter against this project. Everything compiles, runs, and works well.
It is a little frustrating as it is one of the first projects that comes up when searching for "go" and "gtk3" on Google. So, it is is an alternative to what you are doing I guess.
Actually, some of my coworkers had tried it previously and couldn't get it working either. I just didn't know they had tried it, and they didn't ask me to play around with it to try and get it in shape (this may have been before I started working full time with Conformal).
So this was just me not being aware of it, but others of us at Conformal were, and due to the above issues we decided to do our own.
It is a little frustrating as it is one of the first projects that comes up when searching for "go" and "gtk3" on Google. So, it is is an alternative to what you are doing I guess.