ang gcms notes, ay diary nang kung ano ginagawa nang visa officers sa application mo. don mo makikita yun notes nya at nasan na yun papers mo, kung na kaput away status (meaning may hinintay sya approval from main officer mo sa cpc-m, or may wait na document sayo) , dito mo makita kung ano na status nang elligibility mo, kung review required, recommended interview, recommended pass or pass ka na. Dito mo din makita kung yun criminality mo if in progress, not started or passed na since parallel sya sa elligibility mo, meaning if elligibility pass, saka magpass yun criminality mo. Now for security, naman it will show you not started or if meron nang s.15(1) status, that means tapos na security mo. Then finally medical mo, kung not started, or passed ka na. The thing is ,the most important part is the notes where the visa officer will put their feedbacks, which includes if real or bonafide yun relationship nyo nang spouse nyo o kaya naman, ano pa yun documents na needed nila sainyo,like additional data for proving genuine relationship, ie passport request, ie police clearance. andon lahat, makita mo doon more than the IN PROGRESS SA ECAS or IN PROGRESS sa myCIC link online.
It will give you also an idea if ano stage ka na nang processing, and when do you expect a passport request. kasi makita mo din doon kung kelan nila buksan documents mo lalo pag naka put away documents mo.
I hope it gave you a brief info on what gcms notes is.
For ordering visit this site: https://atip-aiprp.apps.gc.ca/atip/
You can ask your sponsor to order in your behalf provided na ikaw yun PA side.