From what I see it is a genuine gg piece.
The fakes don't have that knurll pattern on the mouthpiece and look at your tip if the mp if there is no champher 100 percent it's a copy. I have held a fake one and can pin point the differences in them. That and no v2 have been cloned from what's been in the light. Not saying it's not possible but from pics, the knurlls on the base the rest of ody, it is legit.
The fakes don't have that knurll pattern on the mouthpiece and look at your tip if the mp if there is no champher 100 percent it's a copy. I have held a fake one and can pin point the differences in them. That and no v2 have been cloned from what's been in the light. Not saying it's not possible but from pics, the knurlls on the base the rest of ody, it is legit.