gomtv is gone.
GSL still exists, here
http://www.twitch.tv/gsl/profile
Blizzard created WCS and more or less forced the major tournaments to collaborate with it (or GTFO). there are three regions. Korea still has all of the players on Korean (almost all Kespa at this point) teams and most of the talent. North America has the top Korean players on American teams, some of the reject Koreans, and the awful NA players. Europe has the remainder of the reject Koreans + MC + jjakji + MMA and the top European players.
If this forum is any indication of SC's health, it isn't doing too well
Even artosis only streams hearthstone and has basically abandoned meta to do hearthstone shows.