hack to load "system" gems not listed in your Gemfile when using Rails console - add this snippet to your ~/.irbrc

irbrc.rb

# Add all gems installed in the system to the $LOAD_PATH so they can be used in Rails console with Bundler
if defined?(::Bundler)
  current_ruby_version = `rbenv version`.split(" ").first
  gem_paths = Dir.glob("#{ENV["HOME"]}/.rbenv/versions/#{current_ruby_version}/lib/ruby/gems/**/gems/*/lib")
  gem_paths.each do |path|
    $LOAD_PATH << path
  end
end

# now you can just normally install these gems ('gem install <gem-name>') into your system and keep your Gemfile listing only your app's dependencies. I use this with wirble, awesome_print and looksee and it works just fine. :)