I have built a bare gnome 2.18.3 for Bluewhite64 12.0, there are not as much
packages like an Ubuntu install but you probably can build any Gnome package
you like with this base.

This build is provided as is, please backup your data before trying it. 

For installation instructions please read INSTALL.TXT

The only package replaced is gnome-icon-theme, and you can select gnome as an
option in xwmconfig.

If you have any trouble please post in the gnome support thread:

http://www.bluewhite64.com/e107_plugins/forum/forum_viewtopic.php?1329

For those interested, I compiled them with CFLAGS="-march=x86-64 -pipe -O2" and CHOST="x86_64-pc-linux"

All credit go to this guy for his slackbuilds

http://jaguarlinux.com/pub/slackware/source/gnome-2.18.3/

I just built the packages for the x86_64 arch and ignored already built or 
problematic ones like firefox and eikiga