Push etckeeper created repository to remote Gitlab server, advices welcomed

I'm playing with etckeeper and it seems to be a good product. I use it only to track /etc filesystem locally, but these days the idea came to my mind - to create central Gitlab repository and to store all the node /etc repositories there. The question is how can I do that? I noticed in the config of etckeeper, there is a variable called: PUSH_REMOTE="", but do I have to create separate repository for every server or I can use one and combine all the servers in it? Maybe I can use branches? Or different folders? Any advice's are welcomed. I will try to do it in manual way, and if it works I will think how to do it in automated way, via Puppet or Ansible.. Thanks in advance.