GDC is the Game Developers' Conference that happens every year up in San Francisco, and the company also hosts a number of other GDC events all over the world. Usually, they do GDC Online in Austin, TX every fall, but that conference has recently been changed into two different conferences, both of which are set to take place later this year in Los Angeles. One half of the conference will be called GDC Next, and will focus on the future of gaming development, featuring things like the new Ouya console, cloud gaming, and next generation platforms. And the other half is now called the App Developers' Conference, and will focus on not just game development, but mobile app development as well.
Both shows are being held in Los Angeles on November 5-7, 2013, and both shows are now open for submissions for panels and talks. ADC is obviously looking for app makers who can speak on the design, business, and actual programming of apps, so there will undoubtedly be some talented iOS developers there that week. If you have a great idea you'd like to present, you'll need to get your submission in by May 29.
It's interesting to note this change. The official GDC itself has also been swinging more towards mobile game development, and away from major studio talks and presentations. This last year at GDC, there was an indie scene like I've never experienced before, and while some of that was driven by major publishers like Sony and Microsoft, much of it has to do with Apple's App Store and other mobile opportunities. As a result, more than ever of GDC is dedicated specifically to smaller mobile developers, and these two new conferences are part of that push.