The GravityView plugin is the best way to display Gravity Forms entries publicly on your website. Basic GravityView support is built right into Gravity PDF.
Add PDF Download Link to View
You can easily add PDF Download links to your View. To do this you'll need to use GravityView's Custom Content Field. Go edit your View in the admin area, click the
+ Add Field button in the Multiple Entries or Single Entry tab, and click Custom Content. Next, go to your form's Manage PDF page, copy the
[gravitypdf] shortcode in the list and paste it into the View's Custom Content Field. Save the View and go check if it's working.
Adding a Gravity PDF shortcode to GravityView's Custom Content field.
The PDF Download links added to a GravityView table
Using a Membership plugin that allows you to show/hide content based on user roles (Paid Memberships Pro comes to mind). You can display the GravityView to a user with a Role that includes one of the capabilities found in Gravity PDF's User Restriction setting – by default, this is only the Administrator role. Not sure what Roles and Capabilities are? Here's a great article from WPShout discussing the finer points.
If you'd like anyone with access to your View to securely download the PDF(s), you can take advantage of signed PDF URLs introduced in Gravity PDF 5.1. Just amend the [gravitypdf] shortcode added to the Custom Content Field and include the
[gravitypdf name="Default Template" id="56ea5a3b2c684" text="Download PDF" signed="1"]