I would move the code and files which you want to remain private to Bit Bucket (https://bitbucket.org
). Git Hub (the free account) is completely public and searchable by web crawlers such as Google; whereas the free Bit Bucket account allows you to have private (and public if you wish) source code.
I've been using both Bit Bucket and Git Hub for awhile, I simply put my private work\business source code on Bit Bucket. Also, Bit Bucket has an option where you can simply transfer these files from Git Hub via a web interface - very nice and simple.