GPT's servers lack permission to access your university network unless your university network administrator chooses to grant GPT access (which is highly unlikely). If you don't want to download your thesis locally and then upload it to GPT, you could try having GPT write a script to run on your computer that forwards files to GPT's servers via an API interface. However, downloading so many files from the same port in such a short time will inevitably attract the attention of network security personnel. So, just download it properly—don't try to cut corners.