mosquitto/www/posts/2012/12/libmosquitto-go-bindings.md

I just discovered that Shane Hanna has written a Go language binding for libmosquitto available at https://bitbucket.org/shanehanna/mosquitto/. Good work Shane! Note that the readme file states:

Doesn't expose all of libmosquitto, just what I've needed so far.

so you shouldn't necessarily expect everything to work.