Well I'm not too good with linux but I know there are drivers out there sourceforge.net has a few projects that make the LCD work and some that make the buttons work I have been trying to install this on Ubuntu 6.10 and being a very inexperienced person in linux I have not gotten them to work but many people have..
Also I have googled this and there is another site I will post up once I get home from class.
The site has Pictures of what the guy has configured the LCD to show ..
The Search Results
Search Results for G15 linux
Specific Ones that Are for the keyboard itself
Those are the only ones I can find at this moment and at the computer I have access to.
This is one of the few sites I found on google.