I have been using it for a month now on our internal test version of Self Service which has been interesting. I haven't lost any stats and we have gone from 7.6.1 to 7.7.2 successfully. Has anything changed on your platform and could anything of changed on your corporate firewall etc?
I use GA in two ways, embedded in calculations and in iframes too.
Good luck finding the GA snippet and getting this sorted, It's a shame LD do not support this officially!
Best regards,
Dan