Thanks for the update. I will use new portal as I already hold valid Canada and US visa but wife does not.GCKEY is the IRCC secure account, which is older than the IRCC portal account. They are pretty much the same regarding visitor visa application. the only difference is that GCKEY always asks for more supporting documents, which, if necessary, i think you can upload to the client information section in the portal account as well. More supporting documents sometimes means better application, but not always. this is your call after all.