Agree with everything lpc said. Really no point in ordering notes until month 9 or 10. The current timeline indicates 10 months to receive MR, which means that there probably wont be much on your notes. Ordered mine 6 months in as well, and nothing on them.
Also as lpc suggested, you can always order a set a little bit after CPP-O confirms attaching additional documents...so you can confirm they have indeed been added.
GCMS notes will summarize your application and provide context to VO's decision. Basically, the rationale behind the decision. But also all the steps in the process, including submission, AOR, attachments, MR, criminality and admissibility. The only part you wont see details on is security, which is handled by CSIS, and because of national security reasons, details are never disclosed.
You can order the notes through ATIP. http://www.cic.gc.ca/english/department/atip/requests-atip.asp