Hi -
I followed this article http://blogs.technet.com/b/kfalde/archive/2014/09/29/managing-trusted-sites-via-policy-for-emet-asr.aspx
to add trusted sites via GPO. I was able to add the trusted sites via GPO but after applying the GPO I am not able to add/remove sites from the IE. I tested on IE 9 32 and 64 bit so far.
Below is the text from the article I used above. I am not sure what I am doing wrong. Please help. Thank you!
The first key will be under HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\InternetSettings\ZoneMap\Domains\domainname.com with a dword value named * and value data of 2
The second key will be under HKLM\Software\Wow6432Node\Policies\Microsoft\Windows\CurrentVersion\InternetSettings\ZoneMap\Domains\domainname.com with a dword value named * and a value data of 2.
Make sure you use the domain name you want and not domainname.com 
I’m
using bing.com in my screenshot above. Also the 2 keys makes sure that we are covering both the x86 and x64 versions of IE.