BAD NEWS for GS!!!
I went today and to get some eBay cards. I did this in Friday at this store no problem. The employee even remember me. Well went I try to pay with a GC the system wouldn't allow it. He was surprised he even told the other employees and everyone was very surprised. Because he remember me, what he did for me was we made a purchase he return it as "cash" and then he loaded the eBay GC and "paid" with that cash. Obviously this was a one time thing.
So it seems that unfortunately the loop was closed for GS. It was a physical GC.
Strange. I was successful over the weekend. Not only that, if you go to their "Game Cards" page on the website, it encourages using gift cards for purchasing them. Look at the bottom of this page:
http://www.gamestop.com/collection/game-cards?recfl=0