This project is all about getting your own gollum wiki hosted on Red Hat's Openshift. It's quite straight forward. Just sign up for an OpenShift account and follow these instructions:
$ rhc app create -a gollum -t ruby-1.9
$ cd gollum
$ git remote add upstream -m master git@github.com:mignev/gollum-openshift.git
$ git pull -s recursive -X theirs upstream master
$ git push
The default username/password are wiki/wiki.
Let me know if you have problems ...
Enjoy,
Hardy