I just looked over all of your posts and I really don't see where you ask for any advice on helping your
GPs except in posts #18 and #20 of this thread. In that post you ask "
Can you give examples of how I can make my shed suit my GP's needs?".
That question was, basically, already answered. Don't bother making your shed suitable for your pigs-Make room in your home for your pigs.
In post #16 you vaguely ask for help but it is unclear what you want help with.
I don't think anyone here is going to help you make your shed a better place for them to live since few people here think they should be housed in any type of shed in the first place.
Moving them indoors will not overly stress them. There are plenty of people who rescue or buy
GPs from owners and breeders that house animals outdoors and the new owner houses them inside when they get them home. The
GPs tend not to drop dead from stress.
Find room, build large housing and make the move.