The items are added to the query string with a parmater map. You put the key/value pairs in the parameter map and pass the parameter map to the qie.callRESTWwebService() as the "parameters" argument:
//Create a paramter map
var parameterMap = qie.newParameterMap();
//Add the key, value pairs to the parameter map
parameterMap.put("givenName", "myFirstName");
parameterMap.put("lastName", "myLastName");
parameterMap.put("dob", "19700101");
parameterMap.put("gender", "U");
//Pass the parameterMap into the callRESTWebService as the "parameters" argument.
var value = qie.callRESTWebService(
"My Webservice Connection",
null,
"GET",
null,
parameterMap,
60000);
See also:
Handling HTTP requests and responses
Making Requests via qie.callRESTWebService()