Reading hidden fields data

I created a quite complex form filled with hidden fields (don't ask why, please) which is published to a custom post type.

How can I display each post hidden fields values in my theme? The regular ones (title, content, etc) are displayed correctly, but I can't find a way to display, or call the hidden fields. Since these fields are stored in a gravity form table, I can't finde the answer in Wordpress Codex. Neither I was able to find it here.

I'm pretty sure that it's quite easy, but I don't know where to find this.

Thanks!

Thanks Rob, the first suggestion is what I should have done. But sadly the form already exists and some data has been entered (not much, though).

So basically I need to read that data which is not in the custom fields.

I didn't understand your second suggestion, but I believe it doesn't solve my problem.

I need to read the data that has already been entered in that table (wp_rg_lead_detail).

Maybe I should start all over again and instead of using hidden fields to store my data I should rebuild the form, use custom fields and re-enter the data that was entered before.

Thanks!

Glad to help!