It's not unique to GameStop, we also have a European chain called GAME which is the same. They're trying to revive themselves with second hand consoles and phones.
I was interested, because I’ve never heard of them, yet I know of GAME in South Africa.
Looks [0] like GAME in UK is a UK-only chain, and GAME in SA is an eventually-owned-by-Walmart SA-only chain.
[0] https://en.wikipedia.org/wiki/Game_(disambiguation)#Brands_a...
Wikipedia says they are also active in Ireland but they left that country many years ago (it's annoying, nobody bothers with Ireland, there isn't even a real Apple store even though Apple has their own EU Headquarters there!).
And apparently they were in Sweden too at some point: https://en.wikipedia.org/wiki/Game_(retailer)#/media/File:Ga...