iOS Location aware High Score in Game Centre

[IDMah]

Hi all.

Ok finally getting around to adding global high score tables to
Dragon Emperor's Challenge. with three tiered.

Local High score - Country Highscore - World HighScore.

I was thinking of using the game centre but apart from encoding the City, and Country into the user name. How would I include a location data in high scores?

GKPlayer seems to only have alias and playerID
I'd like to avoid rolling my own server if at all possible.

thanks
Ian

ps. to answer my own question, I guess if I drop the Country HighScore,
I don't really need to know the user's location.