These guides were written by Mentors, Organization Administrators and Google Program Administrators.
GSoC Contributor/Student Guide
If you want to increase your chances of being accepted into (and succeed during) Google Summer of Code we strongly encourage you to read this guide! It is particularly helpful for tips on writing a good project proposal and how potential contributors should interact with the communities they are interested in working with during the program.
The authors have years of collective knowledge for how to successfully mentor new contributors/students. It's not as easy as it seems, and the guide provides useful tips and best practices.