The initial version that was released didn’t work out of the box. I had to do a bit of hacking around to get it working. I do have a solution that works pretty well. I think the plug-in has been updated but I don’t know if it works any better.
The missing bit was a simple conditional statement wrapping the GA code. So….
<?php // If our cookie is set
if(isset($_COOKIE['ecd_opt_in']) && !empty($_COOKIE['ecd_opt_in'])) { ?>
<!--Your Javascript GA tracking code here-->
<?php } ?>
You have to add your GA code manually in the place provided.
See https://www.metalucci.com/ for an example.
Hope this helps.