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"