Rated 4 out of 5 stars

Postal address does not sync, tried everything, just not possible.

This review is for a previous version of the add-on (0.3.6). 

Did you try:
1) The development version at the bottom of this page? It has postal address sync enabled by default.
2) Looking at the FAQ: http://www.pirules.org/addons/gcontactsync/faq.php#addresses
3) The forums: http://pirules.org/forum/index.php/topic,280.msg1126.html#msg1126