https://rubytogether.org/news/2015-10-30-october-2015-monthly-update
The most significant progress was on the new gemstash project, an open source server for hosting gems. Gemstash is able to act as a caching proxy for RubyGems.org, providing local copies of gems for a data center or office. It is also able to host private or internal gems, and offers an easy way for teams to migrate away from using gems directly out of git repositories.