The 2014 Game Developers Conference Call for Submissions will be open from July 22 - August 29, 2013. The Summits Call for Submissions will launch after the main Call for Submissions closes.
What is a submission?
It's basically something you would like to be able to present to the advisory board at the GDC for inclusion at the 2014 GDC. It can't be anything product or service related, only real topics you feel you can talk to crowds of people about, and that relates to game technology interests in general. All submissions must be presented by the original author as well (no ghost-writing), PR firms, or anyone else can represent you. If you get approved you could be presenting your topic or discussion at the GDC in 2014!