Capture Lead Source (UTM?) on WordPress and pass to Gravity Form

Hi,

The aim of this is to capture Google Analytics data such as Source, Medium, Term etc and push this information into Gravity forms as a hidden field so that in my form notificiations i can see if the user came from an organic search, an adwords campaign, social etc.

This will then be pushed from the gravity form directly into my CRM so i can run reports on which sources are generating the most profit for the business. The form allready pushes the data to CRM so this job posting does not involve any work with linking the form to the crm, i just need to be able to get the source, medium etc to push through into the form submission.

I have tried two plugins one of them was UTM tracker and the other was HandL UTM Grabber. Neither of these seem to work, no information is being passed over to the form in the hidden fields during my tests.

Therefore i want to have a custom plugin built that will enable me to capture this information as accurately as possible.

Please note that the website has WP rocket plugin which can cause issues i.e caching querys so this needs to be considered/added as an exception to the cache.

Danny