How to get first Monday of every month ServiceNow working code

var gdt = new GlideDateTime();
 var day = gdt.getDayOfWeek();
gs.print("getDayOfWeek="+gdt.getDayOfWeek());
gs.print("getDayOfMonth="+gdt.getDayOfMonth());
var result = false;
 if (day == 1 && gdt.getDayOfMonth()<=7){
 result = true;
 }
 gs.print(result);