<meta name="robots" content="noindex" />
While the "spiders" will still continue to visit the page, the information will not be indexed.
Let me know if you have any other questions or concerns!
Jesse
I agree. We have same issue. Our PDFs links are distributed through Thank You Emails and yet the PDF link (that are gated) are showing up in Google Search. This is an issue for us. The discussion is quite old. Has any solution been found since?