Implement support for Enhanced eCommerce to the Google Analytics addon
Google Analytics addon does support their Universal Analytics option, so order and basic traffic tracking is currently possible.
What is not possible, and would be useful for the management of advanced campaigns, is the implementation of Google Enhanced eCommerce for the measurement of the following enhanced ecommerce activities:
Product Detail Impressions
Add / Remove from Cart
All details here: https://developers.google.com/tag-manager/enhanced-ecommerce