Hi
See this site:
http://www.ucos-ii.com/
They have a open source GUI that you can buy and use in your design,they also have softwares for fonts and bitmaps ,you can build your own BMP or FONT as a C header file (you can use windows bmp files ,and windows fonts also)

See this site:
http://www.ramtex.dk/ramtex.htm
they have the lib you need.

For more info you can email me

bye