I created a local repository of my Visual Studio 2010 solution folder using Git GUI on my dev machine. I then created a remote repository in my GitHub account. Now, I am loo
Subversion implicitly has the remote repository associated with it at all times. Git, on the other hand, allows many "remotes", each of which represents a single remote place you can push to or pull from.
You need to add a remote for the GitHub repository to your local repository, then use git push ${remote}
or git pull ${remote}
to push and pull respectively - or the GUI equivalents.
Pro Git discusses remotes here: http://git-scm.com/book/ch2-5.html
The GitHub help also discusses them in a more "task-focused" way here: http://help.github.com/remotes/
Once you have associated the two you will be able to push or pull branches.