It seems to be a "virus" program.
If you Google the name, several solutions come up.
Don't click the download in my link, before you are totally sure, its safe, its the first link i found.
There seems to be a lot of solutions to remove this program
It's full name is Norton has blocked Web Attack: JSCoinminer Webste2, Norton blocks it every time it comes up but it has to be something that has attached itself to gg maybe some kind of spyware. Let me know what anyone finds out.
Im so sure it has nothing to do wiht Gonegamling. Its something else you have caught elsewhere,
Its A Hijack of your browser, which you can delete with a fix or disable in you settings
If it was a problem with GG; we would all have it. I don't have it and i do not have Norton.
Try google it and you can easily find a solution