3. Gendry is the child of Cersei and Robert Baratheon.
The creators of the show still owe us a reveal of the mystery of Gendry’s birth, and fans are pretty sure that Gendry is a lot more than just a bastard. It was mentioned that Cersei and Robert had a child that died shortly after his birth — but fans are sure that’s there’s no reason to believe this. It is also known that Gendry’s mother had yellow hair.
Moreover, fans are confused about the fact that Cersei has never visited her dead baby son in the crypt, even though we know what a devoted mother she is. It’s probably because she knows that her son isn’t in the crypt, but in Fleabottom as a blacksmith’s apprentice. And finally, fans think that it was Cersei who was looking for Gendry during Joffrey’s purge of Robert’s bastards in order to save him.