It's easy. You become a famous grandmaster... one of the best players in history, and the games are very nicely posted there for you. You don't have to do anything else.
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edit: ok.. that was my smartalec response...
I think there actually is a way for you to upload your own games there. I thought i read that anyway. But i have only gone there to play through grandmaster games. It is an excellent resource that I've used A LOT. It's probably the only other chess site on the net besides chess.com that I use enough to merit paying for (most of the services are free anyway).
Do people here regularly use chess games?
I personally think it is very good
But what about you guys?
And finaly a Question how do you replay your own chess games on chess games.com