We lost a big opportunity last year, so let's be better prepared this time.
Application for organizations starts in 6 weeks on Feb 9, deadline is Feb 20.

Any volunteer for managing the application?

There is a wiki page as a starting point http://wiki.dlang.org/GSOC_2015_Ideas.
The ideas need to be prioritized, we need to organize mentors, attract students and write a compelling application.

http://www.google-melange.com/gsoc/homepage/google/gsoc2015