I don't know of one for your model -- you might have to use a Gateway IDT driver -- but here is a tip. Go to http://support.microsoft.com/kb/888111 and get the UAA driver. Install it and restart the computer. It will help with getting an HD audio driver to install in XP when you find one.
Jim Coates -- 15 years on the Dell Laptop Audio boards -- since 2/6/04