The following is a list of New Gods-related trade paperbacks currently in print. I have included links to each TPB's listing at Amazon.Com, where you can find out further information on each volume, including the price, ISBN, and what various readers & reviewers thought of each collection.
Cosmic Odyssey - reprinting the four issue miniseries by Jim Starlin & Mike Mignola.
Great Darkness Saga - reprinting Legion of Superheroes #290-294 and Annual #3, by Paul Levitz, Keith Giffen, Larry Mahlstedt & Curt Swan, the classic story of Darkseid's return in the 30th Century.
Jack Kirby's New Gods - reprinting New Gods #1-11.
Jack Kirby's Forever People - reprinting Forever People #1-11.
Jack Kirby's Mister Miracle - reprinting Mister Miracle #1-10.
Jack Kirby's Fourth World - reprinting Mister Miracle #11-18.
Orion: The Gates of Apokolips - reprinting Orion #1-5, plus additional material by Walter Simonson.
Superman: The Dark Side - reprinting John Francis Moore & Kieron Dwyer's Elseworlds miniseries, which features the New Gods in a prominent role.
Wonder Woman: Second Genesis - reprinting Wonder Woman #101-104, by John Byrne, featuring Wonder Woman's battle against Darkseid & Apokolips.