None of this has anything to do with Gravity Forms after the post is created. You are trying to display all posts created, by day, in a calendar format. It does not matter how the post was created (in your case, created via a Gravity Form submission.)
I found this support topic:
Which recommended the plugin you are trying to use:
You will have to check with that plugin author for information on configuring the plugin to pull out the posts by date based on your custom field date.
The WordPress post calendar widget already generates a month calendar, with previous and next months, with the date styled and the title text for the link to that day's archive is all the post titles for posts created that day. It seems you could copy that widget functionality and output some additional information. The WordPress function is get_calendar(): http://codex.wordpress.org/Function_Reference/get_calendar
You may be able to find a large version of that functionality in a WordPress plugin. Maybe FT Calendar does that. If so, please contact that plugin author for configuration information on using your custom field.
Posted 7 years ago on Thursday March 7, 2013 | Permalink