No, Kingdom Hearts was never released for the Gamecube.
Yes!
No and probably never will be.
No it has been announced to be on GameCube.
Kingdom hearts is on various systems, including, gamecube, playstation 2, Nintendo ds, Nintendo 3ds, psp, and mobile phones.
kingdom hearts dream drop distance will be released on the 20th july
Kingdom Hearts was released in Japan on January 9th 2010.
Kingdom Hearts Coded is a game the only cell phone Kingdom Hearts game. It was only released in Japan and will not be released anywhere alse.
Kingdom Hearts 2 was released in 2005/06
Kingdom Hearts was released on September 17th, 2002.
Kingdom Hearts, Kingdom Hearts: Chain of Memories, and Kingdom Hearts II have already been released. They are making three new Kingdom Hearts games (for PSP, Nintendo DS, and cell phones) planned to be released Summer 2009.
Kingdom Hearts Chain of Memories was the first Kingdom Hearts title after Kingdom Hearts, it was originally released on the Nintendo Advance/SP but they later rereleased it for the PlayStation 2.
Kingdom Hearts Re:coded should be released on January 14th, 2011 in Australia.