If the reason that this is hosted on Google Drive is the file size limit, you have some options for hosting it directly on Itch!
The best option is to upload it with "Butler," Itch's interface for uploading games and generating patch files that the Itch desktop client can use. The Itch Desktop App now includes a graphical version of Butler as well (standalone Butler is run in the command line), which was just added: https://itch.io/updates/pushing-builds-with-butler-is-now-in-the-itch-app
Butler has a 2GB limit on filesize by default, which can be increased on request by emailing support@itch.io. (but it looks like 2gb would be fine in this instance!)
If you really want to use the web uploader though, Itch can increase the limit for that up to 2GB (max, that's as far as it can go) by emailing support@itch.io.