You'll literally see everything in your GCMS notes. Right from the time you got picked in the EE pool to document uploads to automatic messages sent to/from CIC or any incoming documents to the CIC office. You can actually see every "update" or transfer of your case between offices.
(When I got mine, it had many offices tagged to it, OSC, CIO Sydney, CPC Vegreville , Info sharing to 3 countries (since I live in the US)). It's a long and convoluted document to even decipher. It takes time to understand.
Many do find this process frustrating since we tend to look at another case and conclude that the VO is slow or that the timeline processing is unfair. This has been mentioned before here, it's on a case-to-case basis.
Let's hope that the GCMS notes clarifies all your questions
!