Hi @jepser
You can view the console log to see if your cpt_template data is being sent in the AJAX request.
There are 3 parts to the PHP code. You have shown the first; adding the rule choice, but have you added the code to select a rule value? And have you written the logic to do the comparing and return true / false?
All is explained in this tutorial:
http://www.advancedcustomfields.com/resources/tutorials/custom-location-rules/
Thanks
E