Little to nothing is known about about Gloria's father's life prior to or as the outbreak began, except that he was married to Gloria's mother.
In a flashback, Nick and Gloria wait in the hallway of their rehabilitation facility. They see Gloria's well-to-do parents check in at the front desk. Madison arrives and waves at him. They are taken to a private room, where Madison tells Nick why his father isn't visiting; he died in a head-on collision. Nick breaks down and screams in grief. Gloria's parents look behind them as Gloria runs over to the room and looks in seeing Madison hugging Nick.
As the city of Los Angeles quickly fell to the undead, Gloria's father's fate remains unclear. It is unknown whether he was able to survive the outbreak or was killed and/or turned into a zombie.
- Lyn Alicia Henderson, who portrayed the drug counselor in the flashback scene, revealed Gloria's parents description on the call sheet as that of "upper crust, uptight, rigid parents".