ACM-ICPC Registration

Hey ,just a simple question. Is it our decision to choose which site to go if we have registered for dual site like pune-Gwalior or is it their decision?

no its not your decision the IIT you choosed you have to go in that

Didn’t understood. Can you please elaborate. For example let’s say I have register for pune-Gwalior and qualified online test. Then who will decide whether I will go to pune or Gwalior.

They will decide.
You cannot be assured to get what you want.
However they try to divide it accordingly( according to wish of people). But no one can guarantee you.
It totally their decision.