Download Gemini Management and take it for a spin. Read the docs. Check out and build the code. Then tweet, blog, or post to the Gemini Developer mailing list. It's as simple as that. Maybe later you'll want to file bugs or send in patches to the docs and code. Further information about the project is on the Gemini Management wiki
All of our source code is in our Eclipse Git repository, if you are new to Git then you may want to try the following resources.