I'm new to query strings, and am trying to get data to post to a redirect page after submit. On my site, I'm using gravity forms so users can purchase a service. The form redirects to PayPal and all is well. After confirmation of payment, they are redirected to a new page. I've passed the query string to the redirect page, but have absolutely no idea how to post data in Wordpress to show the query string. Call me a novice developer, I guess.
Could you give me the walk through, on how to populate data on a new page (not in a form), using the query string parameters outlined in the form settings, redirect page.