Hi,

Value of Retired is 6. So, in your code you can query whether Operational status is not 6.

isContainsRetiredCIs: function(change_request) {
	var taskGR = new GlideRecord('task_ci');
	taskGR.addQuery('task',change_request); // Use this line if change_request has sys_id. If it has Change Number then comment this line and uncomment next line
	//taskGR.addQuery('task.number',change_request); 
	taskGR.addEncodedQuery('ci_item.operational_status!=6'); // Check if operational status is not retired
	taskGR.query();
	return taskGR.hasNext(); // Return true if record returned. Otherwise return false
};
},