Graham King’s GK Films is headed to Oz, mounting a sci-fi action film titled “Outback” with Carey Mulligan attached to star and Gary Ross on board to direct.Nissar Modi (“Z For Zachariah”) will write the script based on an original idea that he and Ross conceived. Tobey Maguire is set to produce along with Ross, King and his GK Films partner Tim Headington. Producers are keeping the logline under wraps, but the story will be set in the Australian outback. Mulligan is set to spend the summer filming Baz Luhrmann’s adaptation of “The Great Gatsby” in Australia. Thesp next stars opposite Ryan Gosling in Nicolas Winding Refn’s stylish crime pic “Drive” and opposite Michael Fassbender in Steve McQueen’s sex addiction drama “Shame.” Ross is currently filming Lionsgate’s adaptation of “The Hunger Games.” GK Films recently produced a trio of Johnny Depp pics — “The Tourist,” “Rango” and “The Rum Diary” — the latter of which its subsidiary FilmDistrict will release in the U.S. on Oct. 28. FilmDistrict is also releasing Angelina Jolie’s directorial debut “In the Land of Blood and Honey,” a GK Films production, on Dec. 23. GK is currently in post-production on Martin Scorsese’s 3D adventure “Hugo,” which Paramount opens Nov. 23. Company’s upcoming projects include a feature adaptation of “Jersey Boys,” a reboot of the “Tomb Raider” franchise and an untitled biopic of Queen singer Freddie Mercury, toplined by Sacha Baron Cohen. CAA reps Mulligan, Ross, Maguire and Modi.