guannstar, I think it would help people out if you posted an image describing what you want
(Maybe a screen shot from a game that uses what you mean)
I can't tell if you wanted an end game score screen (After the game is over and people can talk to each other, like in league of legends).
" how do I create a multi-player group/clan stat page for my game?" <--- This is actually kind of confusing.
Do you mean, you're game will have CLAN that players can join, and you want the stats for said team to be shown?