Yes, CIC agents can access the same info found in the GCMS notes.
Moreover, if you are certain that you are in the IP2 Stage then for sure you passed the eligibility (most important stage). And now you are in the security/background checks, your hands are tied here bro, you can't do anything.
N.B the only reason to call CIC or order GCMS notes is just to find out whether you are stuck at eligibility stage, then one can take pre-remedial actions. If eligibility is passed then it is of no use to do the aforementioned. Chill and wait the finalization of your application.