We have a couple of forms that redirect to a file, but once the form is submitted Gravity forms breaks the URL by removing the "http" in front of the url example:
http://example.com/:/example.com/content/uploads/document.doc
If I use a local url /example.com/content/uploads/document.doc it does the same thing.
*note I didn't use the actual url due to the sensitivity of the site.