Pass Data to Hidden Form Field from Pop-up Trigger?

Hi there,

I have a geo-targeted pop-up and would like to pass data to a hidden form field that is consistent across all of our landing pages. The logic I’m trying to use would be this:

1. Pop-up or sticky bar fires based on user’s location
2. That pop-up or sticky bar loading triggers data to be added to a hidden field on the landing page’s form
3. On form fill, that hidden data gets passed along and I’m able to filter those specific leads automatically

Is there a way that I can pass data automatically to that hidden form regardless of the user’s interaction or lack thereof with the sticky bar or pop-up? Essentially, if Unbounce decides to fire that bar/pop-up, I want the hidden field to read TRUE.