There are some application we need to set GMT instated to sent current time. Following code will help to get accurate Blackberry GMT hours.

Calendar rightnow = Calendar.getInstance(TimeZone.getDefault());
int offsetDST = TimeZone.getDefault().getOffset(1, rightnow.get(Calendar.YEAR), rightnow.get(Calendar.MONTH), rightnow.get(Calendar.DAY_OF_MONTH), rightnow.get(Calendar.DAY_OF_WEEK), rightnow.get(Calendar.MILLISECOND));
System.out.println("Offset (Daylight Savings): "+ offsetDST);
System.out.println(("Offset (Without Daylight Savings): "+ TimeZone.getDefault().getRawOffset()));
System.out.println("GNT Time: "+(float)offsetDST/3600000);
  
this.timezone = ""+(float)offsetDST/3600000;

System.out.println("GMT: "+timezone);

Hope this code will help full.