It is said you can email or using web form, I don't get what your question is. I guess you may mix GCKey account with Web form. You cannot upload photos from your GCKey account. Here is the link to web form,Hi guys,
A quick question, i got additional documents request, asking me to upload my marriage photos.
do i need to email them or upload in my cic account?? in the letter it said to email or web form but when i logged into my account i have an option to upload.
http://www.cic.gc.ca/english/contacts/web-form.asp