In Game of Thrones,
King Joffrey Baratheon is murdered. Where does his body end up?
Is there a different place in A Song of Ice and Fire as compared to the show?
Following will contain spoilers for those who haven't watched/Read:
Proceed ahead at your own hazard, you have been warned.
Joffrey Baratheon is poisoned at his wedding feast and dies.
Cersei then accuses Tyrion of poisoning her son:
Cersei: He did this. He poisoned my son, your king. Take him.
Joff's younger brother Tommen I Baratheon ascends to the throne. This occurred in Season 4 Episode 2.
Joffrey's funeral was held in Great Sept of Baelor. It is implied that his remains were interned there.
In Season 6 Episode 10 we see Cersei burns Sept of Baelor and Tommen commits suicide shortly afterwards.
Then following conversation takes place:
Qyburn: What are your thoughts concerning the king's funeral? As the Sept of Baelor is no longer an option, perhaps a ceremony in the throne room?
Cersei: He should be with his grandfather, his brother, his sister. Burn him and bury his ashes where the sept once stood.
This implies that Joffrey's remains were interned in the Sept of Baelor along with Tywin's and Myrcella's.
Joffrey Baratheon is poisoned at his wedding feast by Tyrells according to Petyr Baelish and dies. Baelish would never lie about such stuff1. His brother Tommen inherits the Iron Throne as the result.
From ASOS Chapter 60, Cersei accuses Tyrion:
Margaery Tyrell began to sob, and Tyrion heard her mother Lady Alerie saying, “He choked, sweetling. He choked on the pie. It was naught to do with you. He choked. We all saw.”
“He did not choke.” Cersei’s voice was sharp as Ser Ilyn’s sword. “My son was poisoned.” She looked to the white knights standing helplessly around her. “Kingsguard, do your duty.”
Joffrey is laid to rest at Great Sept of Baelor as evident from ASOS Chapter 67 (Jaime's POV):
His son was dead, his father had disowned him, and his sister... she had not allowed him to be alone with her once, after that first day in the royal sept where Joffrey lay amongst the candles. Even when they bore him across the city to his tomb in the Great Sept of Baelor, Cersei kept a careful distance.
Books and Show do not differ in Joff's burial site, both state it to be Great Sept of Baelor. There is no evidence that Cersei ever intended to create a Zombie Joffrey like she created a zombie Ser Gregor.
1 If you bought that, I have a magnificent palace in Valyria that I'd love to sell to you.