Hi @jayamal,
Thanks for your interests. You can do what ever you like to discuss about GSoC here . Anyway some tips are here,
- You can directly contact your mentor through email(if there), or Talk message or IRC
- You can create a talk thread for the respected project, and initiate your discussions. You can mention your respected mentor there to get their attention as well as others also.
- You can use our IRC, or Telegram chat also!
Good luck