But once the property is sold, it will not be part of the lawsuit.
Usually when a disputed property is about to be sold, destroyed, moved out of country etc, one party would file a temporary restraining order to stop the property being sold, destroyed, or moved.
Without doing that, the property would be sold, destroyed or moved, and sometimes the lawsuit would become irrelevant.
So in your case, if the title company did their job and found no liens or court orders, and the sale is completed, chances are the lawsuit would have nothing to do with the property.
But this won't stop people from adding liens to the house, you'll have to go to court to fight the lien mistakenly added to the house. That part I cannot gurrantee. I mean if GC1 won the lawsuit and he needed money and the seller won't give it to him, who knows what GC1 could do.