How to add trusted sites to group policy

See Computer Configuration Programs---- Administrative Tools--- group policy tools--- Administrative Tools --- Windows
Components --- Internet Explorer --- Internet Control Panel --- Security Page and then double click to the "Site to zone
assignment list".

Enable it, click Show, add website as value name and 1, 2, 3 or 4 as value.

1. Intranet zone
2. Trusted Sites zone
3. Internet zone
4. Restricted Sites zone

Other reads

How to configuring IE Site Zone mapping using group policy without locking out the user