That would be a question for Geocities.. and I doubt many people here use that.

Seeing that Geocities is owned by Yahoo.. you never know what the answer might be. They are a little nicer than Google when it comes to stuff like this..
My guess would be that you can't. I don't think Google has a problem with it, but you'd have to review their TOS to be sure. I think Geocities is the one to check with first though.