A remote RubyGems repository serves as a caching proxy for a repository managed at a remote URL such as http://rubygems.org.
Once requested, artifacts (Gems) are cached on demand. They can then be removed, but you cannot manually deploy anything into a remote repository.
To create a remote RubyGems repository, execute the following steps:
in the Administration module, under Repositories | Repositories | Remote, click New Remote Repository and set Gems to be the Package Type.
Set the Repository Key, and specify the URL to the remote repository. The example below references rubygems.org.