This is not supported by Pro maps for google.
it would require extensive had coding to accomplish this.
you would need to use the PHP implode() function to convert the comma separated list to an array, then hand code the map javascript to loop through the array and create a new address for each item in the array.
if you want assistance doing this, i would suggest signing up for a primer support ticket where we could work with you in a one on one screen sharing session.