GCMS note is basically detail of ur file , i.e. when ur application received here in canada about the deception they already made ( sponsor approval ) and when is ur file transferred to which visa office document submitted , fees that u paid , what is missing , officers note some times they suggest if visa office need to do sponsored person an interview , you partner detail ( forms , background , criminality , medical, bla bla) , as of ordering the GCMS note u need consent form signed by ur Wife/ husband to apply for note on behalf of her cus to order a note u have to be in canada ( permanent or citizen ) , your status in canada for permanent resident PR id , for citizens CITIZENSHIP CERTIFICATE OR PASSPORT ( copies ) and fee of 5 dollars , u can apply online or send to office here in canada . frankly my recommendation is for u to order is too early ( all u receive is ur status and ur partners application is transferred ) don't wast ur time , but u can chack ur ecas any time that will tell u status of ur application as well . gd luck