Hosting wiki content outside of gitlab.com

I have a substantial content inside project wiki hosted on gitlab.com. Now I would like to give public access to a broader audience and creating groups and giving access on gitlab.com will not fix my issue. I was thinking about hosting gollum on Heroku but I figured out this is not the best idea since gollum is targeting single user, locally available pages. I could process md wiki pages with some static generator like pelican and still host it on Heroku. Another option would be to actually use gitlab pages feature and create new project repo from wiki one. There are number of other possibilities and my question is did anyone already found a good way to solve such case?