[Arkadious]

I've managed to get the Gestalt addon to play nicely with characters greater than Lvl 20 - to a degree.

The important part that did it was commenting out a couple of lines of code from one of the Gestalt scripts.

      ~perform hero.delete[Classes.?]
      perform hero.delete[Hero.HitDice]

      iX = 0
      while (iX < nHitDice)
        iX += 1
        perform hero.assign[Hero.HitDice]
        ~perform hero.assign[Classes.S2Gestalt]
      loop

It will allow classes that aren't being Gestalted to select Lvl-locked abilities at their appropriate levels beyond level 20, but it compounds an existing issue with the addon.

It thinks the character level is significantly higher than actual for the purposes for Suggested Wealth (old issue), and also breaks the level calculation for Starting Cash (new issue).

Ability score increases at levels, skill ranks, feats, and other such stuff still works fine so I'm not sure where the problem is coming from. Will update when I figure it out but so far I'm at a loss.