Hello @ all using Gantry 5 templates,
this question has already been answered to kavalec in the ticket system, and we've also added a new pragraph to the 'new module position' tutorial how to get the BGS in a Gantry 5 template - please see here:
www.extro.media/en/tutorial-extrobgs-en.html
So if you're using a Gantry 5 based template, just follow the tutorial for this template framework to use the BGS.