Are Offshore Gaming Operators allowed in your country?
I assume you mean gambling!
It's pretty simple, offshore gambling is allowed if they hold a license, it's a pretty normal thing, for most of us in Europe by the laws everything that is not a company that has their headquarters inside the country acts like offshore, but they can still get a license or so.
At the same time, you can have a company that is based in an EU country banned in another because it holds none!
Offshore doesn't always mean registered in some exotic jurisdiction!