No, why does it matter? I also don't know where my local GameStop is since the few by me closed a couple years ago :P

Plenty of stuff on EBay offers me 2 day shipping clearly via fulfillment centers, as far as I'm concerned that's all that matters. Do you think the addition of GameStop stores would mean EBay can offer faster shipping than that on a significant number of items?

You asked what could be improved with Gamestop. Public knowledge of Gamestop locations is a boon if people don't know where your existing fulfillment centers are.