Yes, after hitting the submit button, it asked for my signature and security question. This also changed the status of my overall application from "Your action required" to "Submitted". It's been over a week since I uploaded it but there has been no email confirmation that they've received it. Nevertheless I had sent a webform too just in case the document hasn't been received by the GCKey portalAre you sure you selected submit after uploading document(s)?
A confirmation is normally sent by the next day.