GoPro to (old) XSories selfie-stick adaptor
I made this so that I don't need to use the tripod-adapter to attach my GoPros to the XSories selfie-stick. I have an older version of the stick, this will not work with the current range, though if I get a hold of one I'll make an update. :) I have other mounts available also, just have a look at my profile.
It can use the endnut from a standard GoPro-mount, or any other M5-nut.
Enjoy! :)