Sign in page does not (yet) mention Git, just FYI:

Open source your projects using Google Project Hosting

Google Project Hosting is a fast, reliable, and easy open source hosting service. Google Project Hosting gives you:

    + Instant project creation on any topic
    + Subversion and Mercurial code hosting with 2
      gigabytes of storage space
    + Download hosting support with 2 gigabytes of storage
      space
    + Integrated source code browsing and code review tools
      to make it easy to view code, review contributions,
      and maintain a high quality code base
    + An issue tracker and project wiki that are simple,
      yet flexible and powerful, and can adapt to any
      development process
    + Starring and update streams that make it easy to keep
      track of projects and developers that you care about
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