Mandriva does have an app installed by default that is similar to Google desktop. I'll probably get flamed for this.....Kat.
Kat is similar to the Windows application Google Desktop Search and the Mac OSX utility Spotlight.This is a quote from the web page below:
I know nothing about Google desktop, or understand the need for a desktop search engine to search my pc. Is it to try to replace command line tools like locate which works wonderfully? Anyway, it is there, people complain about the resources it uses.Maybe if you read up on it and configured it right it would be ok. Some things just are way faster at command line, and simpler to use than you would think.
Anyway, I don't know a thing about Kat or Google Desktop other than what I have read in forums, that being to dump Kat, and that Kat is like Google Desktop. Above link is so you can make your own decision.