WD Gaster Alive Icon

I really want to find out more about Gaster. He's such a mystery and is probably the biggest mystery in Undertale. I heard he was ripped from reality, died in the core and many other things. Also the theory that he's Sans and Papyrus's father. Maybe that's why Papyrus hates Hotland so much. After all if Sans can survive Hotland with a giant coat on I'm pretty sure Papyrus can handle it. Or maybe it's because alike to me the cold is just more comforting than boiling alive.
(If used give credit)