Step 1:  Select the Groups/Users section in the main console.




Step 2:  Click the 'More' menu next to the Group that you wish to copy.



Step 3:  Select the 'Copy Group to Another Project' menu item.



Step 4:  Click the dropdown menu to select the project to which you would like to copy the group.



Step 5:  Once the Project is selected, click 'Copy.'