I received an e-mail soon after I first submitted my application with the instructions to upload to GIAC after payment of my fee.
Being the nervous wreck I was, I kept signing into GIAC, which presented me with the opportunity to upload, I believe, the day after I submitted my application fee.
I would sign into GIAC and check. For me it says "Complete" and that my file has been forwarded to the graduate committee for review. I called GIAC last week in regards to another question, they are very helpful. You should give them a shout if you have questions.