This morning on visiting GOG I found that the site was stuck in USD with no option to change it to anything else.

After logging out removing cookies etc still no other currency options.

I had to put a game into my basket, go to checkout and then the other currency options
appeared at the bottom of the screen and my currency option reverted back to UK pounds.

Surely this cannot be a legitimate way to get the currency options back ?

No, that's the way it works..

Someone suggested that GOG is using a broken geolocation service, but if that is the case, I don't understand how they always find the correct location when you go to checkout. I think it's more complicated than broken geolocation.

And yes this happens to the rest of us.. I'm randomly switched to Swedish kronor and what have you.