How can I track pop-ups form submissions in GTM or GA?

[#1]

Hi! Does anybody know how to create a tag in GTM to treck pop-ups forms submissions? I use 3 white hats solutions to track general forms, but, unfortunately, it doesn't work for the pop-ups forms. 

[#2 · Accepted solution]

The click class is 'leadin-close-button' when somebody submits on the pop-up form.

If you have more than one pop-up form you'll need to click URL to your trigger that matches the URLs on your pop up.

I take it you if you know GTM you can take it from here.

[#3]

Thanks Mark! This solution sounds more elegant than my one. I simply create two tags for two pop-up forms using a form submission trigger, which is restricted by click IDs that I've extracted from the pop-up forms. I should definitely try your solution.