GUI for Gutsy running a SPARC Machine

I am having a hard time trying to find a repository that supports Gutsy 7.10 SPARC (I'm running a Sun Blade 1000 with an Ultra SPARC processor). Any idea how i can get a gui on my machine?

Thanks in advance for the help

For an architecture like SPARC, you're much better off with Gentoo, rather than Ubuntu. Gentoo builds everything from source code, right on your machine. It's tough to find binaries for RISC platforms, I know, I have several DEC Alpha's running Linux. Gentoo downloads, builds, and installs the software automatically for your architecture, it's great!

First you nee to make sure you have enabled Universe and multiverse repositories in /etc/apt/sources.list file once you have enable you need to use the following command to install GUI
sudo apt-get update
sudo apt-get install ubuntu-desktop