I've suggested something like this for Era. Not sure how it was received. Anyway, maybe it'd be nice for classic.
I think gspar guilds should have a logo on the map attained by number of wins. The guild with the highest number of wins should be "in control" on the map (unless no gang member is there to represent them in the spar room).
Stats earned would not be based on time held, but wins. There should be an extreme number of gspar wins that you earn.
Wins would go toward a guild hat, similarly to how towers earn you hours.