I used gateway recovery disk and reformatted drive. Windows xp works great, but no sound. Under sound shows no audio device. no sound card came with laptop just the recovery cd. this laptop was bought in 1995. tried driver supplied at gateway site, does not work. thanks.
I now have sound thanks to Neowin.net per Inronwolve's info below. This worked for me. Thought I would share.
The Gateway 6525GP isn't listed under the 6000 laptop drivers. A default WinXP install detects it as a Realtek (Doh!). I bet this might get other people, since the AC97 drivers also could show up as something else.