Code.Google is a website that allows users to maintain Code.  Not a lot of recruiters try to source there. The reason is simple they do not know how. Well to do this without worry you need go no further than into your bag of tricks and pull out an old tried and true tool, a simple search with some extras

So to source within Code.Google you simply need to use a skill known as xraying, like the one below. Now the interesting thing is this will actually be a Github results once you open the pages.

site:code.google.com java

If you run the strings above in google you will get the results below.

Now once you have your results you need to simply open the page then you then simply click on a user and then you can search for that user name, and find more info on them

If you need more info on X-raying see my blog post http://www.recruitingblogs.com/profiles/blogs/seeing-what-is-really...