It was recently announced that the project is in development at the cable network and could have a budget of $35 to $40 million (£22 - £25m) per season.
Gaiman told Collider: "I want to make it faithful, but also would like it to have a few surprises for people who read the book. I hate that thing where people have read the books and they [think they] know everything that's going to happen."
The author also revealed that he is determined to have each character's race remain true to the American Gods novel.
"I don't like it when black characters become white in movies, or things like that," he explained. "That was something I found deeply problematic with the attempt by some people who had a lot of money and a lot of clout, and who wanted the rights to [2005 novel] Anansi Boys, at one point."
Gaiman continued: "They made the fatal mistake of saying to me, 'And, of course, the characters won't be black in the movie because black people don't like fantasy'. They were suddenly very surprised that we were no longer interested in selling them the book."
> Neil Gaiman teases American Gods TV series
Watch Digital Spy's interview with Neil Gaiman below: