When you send your Gist link to an invitee or post a link to your scheduling page on your website, you can have Gist automatically display information that's specific to your invitee on your scheduling page such as their name, email, and pre-populated answers to custom invitee questions.
Here's a quick example:
https://getgist.me/jittarao/connect/30mins?name=John%20Doe&email=john.doe@acme.com