The Supernatural finale really left it open for fans to debate on whether or not Chuck the Prophet was God. There were many hints and clues that pointed to yes... and no.
I admit that I am torn on this subject. I feel he was actually God, but then again, the final scene could have only been him going to Heaven, which was promised to him when finishing his task of writing the "Winchester Gospels."
SuperWiki has listed the different arguments about Chuck being a God:
"-Chuck as a writer is the creator of the story of Sam and Dean Winchester in the form of the Supernatural books. He says when confronted with the real Sam and Dean that he "is a god", for all that he puts them through in the books happens in real life.
"Well, there's only one explanation. Obviously I'm a god... I'm definitely a god. A cruel, cruel, capricious god."
– Chuck to Dean and Sam, 4.18 The Monster At The End Of This Book This is explained by Castiel as Chuck being a prophet of God. Castiel says the "Supernatural" Books will become known as the Winchester Gospels.
-The metaphor in this episode is of the writer as creator. Chuck's pseudonym is Carver Edlund, a reference to Supernatural writers Jeremy Carver and Ben Edlund. The character is an avatar for Kripke himself Source and is used to comment on the text and process of writing with reference to specific past episodes of the Show. This metaphor would also hold then is God, the creator, was also the writer. We have a trinity here - Chuck, Kripke and God.
-Sam and Dean find out from the angel Joshua that God is on Earth 5.16 Dark Side Of The Moon
-In the finale there, is further foreshadowing of Chuck's true identity: When Dean calls Chuck, Chuck answers the phone "Mistress Magda," and we briefly see a newspaper ad for a blonde women in a bikini named "Miss Magda" on Chuck's desk before he puts his glass on it. This may be a reference to Mary Magdalene who Jesus, the physical incarnation of God, healed of demons. She then become a follower of his, and an early Christian leader.
-Chuck, after narrating the events that take place, finally appears dressed in white musing on the difficulty of getting endings right. He then disappears - Chuck, it seems, is God.
In the final revelation it appears Chuck is God - the writer of Sam and Dean's story. The fact that they manage to follow their own paths, suggest that the deity chooses to allow free will within the "story" he is writing.
-Fans arguing against Chuck's divinity point primarily to the fact that Dean's Amulet, which Castiel says will "burn hot" in God's presence does not react when Dean and Chuck meet face to face in 4.18 The Monster At The End Of This Book, 4.22 Lucifer Rising, and 5.01 Sympathy For The Devil. However, Joshua tells Sam and Dean in Heaven "Magic amulet or not, you won't be able to find him"."
Sera Gamble also had this to say about the Chuck/God debate:
"
I love a good God debate, so it's nice to hear we got one going this season. We purposely left a bit of room for interpretation. Although many of your readers probably just read that sentence and rolled their eyes because they feel like we made it all very obvious by the end. Nobody thought it was obvious! Do you mean Chuck is the obvious answer, or that you really did leave it open? Don't ask me to squish the God debate! How many TV shows can say their fans are talking about THAT stuff?"
So what are your thoughts? Please feel free to express any argument on the subject, I feel this is a good discussion for Supernatural fans. Thanks to XmutantX for giving me the idea for the poll.