Introducing Garb: Access the Google Analytics Data Export API with Ruby

So, On To Using Garb in Your Project

There are three parts to using Garb. The first is getting a session, which requires your Google Analytics username and password . Second is the profile (or many profiles) that your authenticated account has access to. Last, given the first two parts, you can create reports and retrieve the data from the API.
(Link: Introducing Garb: Access the Google Analytics Data Export API with Ruby)