Noooo no no. If Garfield is a Christ figure then we're all in serious trouble.
I noticed the parallels in STM, especially with his origins. I have somewhat of a more unique perspective on it, personally.
In the LDS/Mormon church there is a concept of three kingdoms... Celestial, Terrestrial, and Telestial. Earth belongs to, or sometimes referred to as being, the Telestial. At the top of the ladder we have the Celestial, which is heaven, wherein our "heavenly parents" reside. Before we became humans, we lived in the Celestial as non-corporeal beings with our heavenly parents. We chose to come to earth to face physical trials, and if we are found true of heart, we retain our physical bodies, which are perfected during the Final Judgment, and we ascend back to the Celestial Kingdom.
Though, when I belonged to the LDS church, heavenly parents were seldom talked about. There is a much stronger emphasis on our earthly family units someday living in eternity.
Anyway, do I believe that? No. Does it strongly remind me of Superman? Definitely. I can't help thinking about Mormon doctrine whenever I watch those starting scenes from STM.