I have tried TurnKey Linux Revision Control appliance and it has gitweb cgi as web interface.
I am looking for appliance similar to turnkey linux that has git and gitorious as web web interface. The deployment of gitorious (e.g.: Setting up Gitorious on your own server) is not an easy job.
I think the closest thing you can come up with is BitNami, potentially I don't know everything that is available in this area though. I know there is a way to set up Git with it, but it seems people are still trying to convince them to support Gitorious.