Despite the efforts of Jim Davis to assure us otherwise, it was revealed in 1989 that Garfield is either dead, lingering in the memories of his own past or trapped in an abandoned house, slowly starving to death.
Kinda puts a whole new spin on the comics since then, doesn't it?
Feel free to read the comics for yourself, or read the discussions on Garfield's sad fate snopes.com
October 23, 1989
October 24, 1989
October 25, 1989
October 26, 1989
October 27, 1989
October 28, 1989