A while ago, I thought the MLP:FiM movie was going to be the end of G4, but seeing as FiM on Youtube lists nine seasons for the show, I seriously doubt it.
I think that's pretty good and bad, for obvious reasons.
I'd really, really love it if it kept going, but seeing as the show's seemed to run out of ideas, if they're going to make a finale in the future , they should make it great!