Once again, it's per the Perfesser, so all grains of salt need to be taken, but it seems to be the blanket G-T library from start to 1995, with the same exceptions.
I'm not that surprised--Fremantle knows there's no place else in the market to take it to, they probably aren't charging that much more than if it was just "Feud" and "MG," and it helps to keep the relationship with GSN on a positive note when they have stuff they want to pitch to them (including the repeats of the current "Feud," once the Pax contract runs out or Pax runs out, whichever comes first).
I could imagine them also pitching "Idol" reruns or repackages to GSN (or something like the supplemental shows they air in the UK on ITV2 with the main "Pop Idol" on ITV1), if Fox doesn't try to pin them into its proposed reality channel--or Simon Fuller doesn't take the show away from Fremantle.