So Gon was searching for him, big deal.
You don't have to meet somebody to know many things about. How he grew up, relationships, stories, adventures, friendships, you can know many things about people without actually meeting them. And you know that Ging was introduced in the beginning.
Man,and all the bullshit about him being untraceable and shit, what the fuck has he been doing all that time, we know he hasn't been to the DC, and I'm assuming he's been keeping tabs on Gon and Netero, probably many others too. So were was he, what the fuck was he doing. If you don't want to talk about somebody, don't mention his name, its that simple. But if you mention someone that is very interesting, obviously people will want to know more about, and then you refuse to say any more than what you already said, then you'r milking the moment buddy.