How have people implemented Google AdWords conversion tracking on the Form Confirmation Dialog within Google Tag Manager?

All is not lost. You can get GTM to fire on your Form Confirmation Dialogs. 

1. Paste your GTM container code into the Unbounce Scripts Manager for your subdomain and set it to show on Pages and Form Confirmation Dialogs. 
2. Paste your GTM container into each Page and Form Confirmation Dialog using the JavaScript editor.

Either way, you’ll see pageviews from your Form Confirmation Dialogs in Google Analytics. Check the Realtime reports to get the form_confirmation URL that you can use to build your goals in GA with a simple regex.

Or, if you’re cynical and don’t trust GTM, use the built-in GA integration in Unbounce, it creates Events for form submissions, link clicks, etc. Then you can easily set up a GA goal for the Category: Form, Action: Submit event.

This was easily corrected by setting up the goal URL correctly in Google Analytics correctly the way I should have done it in the first place.  Instead of using a “URL equals” I just used a simple REGEX: 
(_confirmation.html)$

That way when the script sees any of the various Unbounce confirmation page URL’s in the form of:
/a-form_confirmation.html/b-form_confirmation.html
/c-form_confirmation.html
/d-form_confirmation.html
/e-form_confirmation.html

with the A/B/C/D/E testing it still records the conversion in Analytics without having to set up multiple goal URL’s.  

Either because Unbounce is using small letters for the URL string in the thank you (confirmation) page. No harm to use the “ignore case” function.

I had a conversion fail from Google Adwords last week and am tracking it down. I know in other scripts that Unbounce does not like to have comment code in them. I am looking to see if that is what caused my issue because when you copy the conversion code from AdWords it does have comments in it.

I tracked down what was happening. Be sure when you post the code to delete the comment at the top. that comes from the Google AdWords conversion code. Be sure that the conversion code is posted on your thank page that way without the comment. Then realize that there is often a one day lag in recording the conversion. Be certain you are recording the Google click ID so you could have Google work with you to track it down. Do that by adding a hidden field to your form “gclid” and then that will get sent to you in the email when you receive the lead. In our case it also gets sent to our CRM system.

For example, here is one from my thank you page:

True, I am doing it both ways, either as a script on the confirmation page or in GTM with the rule depending upon which domain. But in Google Analytics if you are establishing “Goals” in that analytics platform you need to code the goal with the regex /.±form_confirmation.html. If you are only tracking “Conversions” in Google Adwords then all you need is to fire that AdWords conversion script via GTM.

Thank you I will try!