Months ago, when I first signed on to the Google Adsense for search [ those who have never used Google Adsense - here's a link -
https://www.google.com/adsense/ws-overview ], it went through a wizard (one part was a customization of the display on how things looked whenever someone used the search feature) and when I was done it gave me several items including the GALT - seeing how the galt contains hex figures, I assume this controls how your search displayed results look once the search is completed. The original adsense for search code you received should have this information, however if it doesn't feel free to use what I have and modify it for your own. As long as you have your own adsense information for your revenue, that is what matters.
Now that I think about it, it probably isn't even called GALT, but its just that mine started with that.
This may also help:
https://www.google.com/support/adsen...f&topic=&type=