As I understand it, it's gone. They possess no archive, except for what was backed up by web archivers. I could be mistaken.
I spent years trying to acquire what remains of Geocities, which is the domain itself, geocities.com. I got closer than you would expect, but was told it was being "used internally" so they couldn't divest of it. I was also told I wasn't the first person that inquired.
As I understand it, geocities.com will go to Verizon (unless that falls apart), who will do god knows what with it. Right now it redirects to Aabaco Small Business, which I think is a spinoff that's not part of the deal. Aabaco curiously has an office in Beaverton, OR, a suburb of Portland, where I live. I've been meaning to drop by their office randomly with a jello mold or something and say hi.
I really want to relaunch geocities.com. I'd love it if someone gave me the domain so I could do that, but I'm not holding my breath.