That is a question that has never been provably answered. I don't think there are very many people that believe they ever had any reasonably sized data center if any at all. J. Mordica's video proved nothing more than 2 small rows of miners somewhere.
EDIT: I have always been under the impression that it was something along the lines of what Bitpop said. Somehow they visited a warehouse and had pictures taken. Whether they paid someone off or not remains to be seen. The picture could also have been photoshopped as some have suggested but I think that to be less likely.
I'm quite sure they had (leased?) the warehouse since their hardware shipping days. Package tracking information confirms that. It was nowhere near ready for mining in August, that's the "unplugged" picture. Later on they published more pictures of electric and venting installations being done in what looked like the same warehouse, and then a few rows of S3/S4 miners plugged in and powered on again in seemingly the same warehouse. Don't make me go look for those pictures

I don't know about the video, maybe that was done in a different place. Now that the miners are being sold off and jmordica may have left GAW they might not even have/lease the warehouse anymore, but just a few weeks ago miners were still being shipped from Hattiesburg, MS.
They also had a smaller place near Hattiesburg, likely their original "GAW hosting" location.
There's nothing to suggest that they had any other substantial facilities, except their "home base" in CT and perhaps a few employees working from their homes in TX etc.
Bitmain picture is clearly NOT of the same warehouse. Not sure if that proves or disproves anything - I still think it's possible that Bitmain's Christmas sale was related to GAW even if the picture was not, but that's just my personal conspiracy theory.
I'd agree but there has never been any address of any warehouse that size linked to GAW. I remember searching, way back in September I believe, and posting questions on HT. I was "informed" by one or a few users that it was somewhere in Hattiesburg. The actual address of GAW in Hattiesburg that I found was some shitty little storefront, with a completely different name and business in the middle of nowhere next to some train tracks. These same users told me that they were shipping from this same address. However, if you saw the location you would realize that nothing was being shipped from it. It was literally the size of say a small 7-11. IDK if I can locate that again but I'll try. There weren't many Josh Garza links when his name was Googled back then.
And the phone number listed is 601-255-0345. I called it again just like I did back in September and it is GAW LABs.