It's unfortunate that you encountered that bug. Most people don't. You don't necessarily have to start over if you have a savegame file on your PC from before the GC disappeared. You could restore that savegame file and continue from that point. Since you have had your GC disappear once, I would refrain from touching him once he's born again. You don't need to, and it's obviously somewhat dangerous!

That bug will be fixed in the v1.1 update of Village Sim.