Tip: Grails variable in javascript

A grails var can be accessed in javascript using $ notation

var rsData = '${ruleSetData}';

If you want to convert it to JSON use encodeAsJSON()
 

var objJSONData =  '${gObject.encodeAsJSON()}' 

and parse this object in javascript using

var parsedJSONData = eval(objJSONData); 

This obj can then be used in JS as

for(var i=0; i< parsedJSONData.length; i++){
  alert(parsedJSONData[i].propertyName);
}