get the mail ids of the group members

var groupMemberMailIds = '';                
                
var gr = new GlideRecord('sys_user_grmember');                
                
gr.addQuery('group.name','<group-name>');                
                
gr.query();                
                
                 
                
while(gr.next()){                
                
  if(groupMemberMailIds != ''){                
                
  groupMemberMailIds += ',' + gr.user.email;                
                
  }else{                
                
  groupMemberMailIds = gr.user.email;                
                
  }                
                
}                
                
gs.log(' groupMemberMailIds are.....'+groupMemberMailIds);