This action runs when a Group Manager is assigned to a group.

do_action('pm_assign_group_manager_privilege',$gid,$user_id);

Simple example

function ProfileGrid_assign_group_manager($gid,$user_id)

{

//do something with the user id and Group ID when a Group Manager is assigned to a group.

}

add_action('pm_assign_group_manager_privilege','ProfileGrid_assign_group_manager');