Unfortunately, HostGator does not allow you to manage your own domain DNS, so to get it working with Podpage, you'll need to contact support.
In the HostGator Dashboard, click Support on the left
Start a live chat and send them the message:
Hello, I’m trying to change the DNS settings for my domain to point to the Podpage website service. I need to set up a CNAME for “www” to point to "domains.podpage.com". I also need to add an A Record for "@" to point to "188.8.131.52". Could you please help?
They should be able to help you get it changed.