I went to necropolis and ALL the ghouls are just frozen standing up and the game counts them as dead. Has anyone seen this? Does anyone know how to fix it?

Thanks! But I cant talk to the peaceful ghouls underground either. Aren't they part of the main quest?

They are part of the main quest, but it's not strictly necessary for them to be alive. You can still get the water chip and/or fix the broken pump, you just won't have anyone pointing you in the right direction. If you already know what to do, however, you can easily get what you need.

I think I've caused some confusion. By outdoor ghouls I meant the ones above ground not in buildings. When I've encountered the bug, only the outdoor ones were still standing, whilst the ones in buildings where displaying the corrected corpse sprite.

As far as I know, all the ghouls will be dead, both above ground and below ground though I'm not sure if the underground ones are affected by the same 'still standing' whilst dead bug, its been a long while.

The ghouls in the vault are all still alive however, but they will have no interactions with the player other than becoming hostile if you dont complete the 'Fix the water pump' quest first, which can still be done even if the town is wiped out.

Yes. Yes they do.

Thanks Everyone! I would just like to say I'm new to gog.com and so far the community is really helpful and nice!

Also, My frozen dead ghouls turned into puddles of blood...

Yeah, bodies go away after a while.
Don't forget to mark this as resolved. I recommend Genryu's post.