I am interested in making an application that requires me to require a gmail gem for ruby. Right now there are 2 gems:
https://github.com/dcparker/ruby-gmail
You could add the following to your Gemfile:
gem 'gmail', :git => "git://github.com/dcparker/ruby-gmail", :branch => "master"
gem 'gmail', :git => "git://github.com/nu7hatch/gmail", :branch => "master"
As others answers and comments have said, you cannot simply require both gems as they are.
However, given that both are hosted on GitHub, you could fork one of them and rename the offending classes. So long as your renaming is consistent within the gem you could use your fork within your Gemfile
Of course, you wouldn't be easily able to rebase changes onto your fork easily but if you really must use both gems this might be a compromise that you are happy with.