I haven't used 1.2x version of Gimp for a while so I can't remember if it allows you to actually change the font to something greater then 72 by simply typing it in, but I believe it did. If not you could always upgrade to the 2.0pre version and do almost anything (it also now handles CMYK).
That did the trick! I typed in the font size of 360 and it put the font on the page nicely.
Thanks for the tip! Clint