If you don't have a RubyMotion app yet, generate one.
$ motion create myapp
$ cd myapp
You'll need to create a Gemfile. Here we're using bubblewrap.
Then, set up your Rakefile to require your bundled gems at compile time.
Add this to the top of the file, right beneath the line `require 'motion/project'`
Next, install your dependencies:
Now you can just compile your app as normal.