GMT relates to time, not date. If you wish to get the full date and time you can simply check the timestamp diffrance between your computer and the server, take the timestamp from the server, deduct the diffrence and translate the timestamp back into the date and time of where you are now.
You can find a function that translates the timestamp to date at :
http://webdev.berber.co.il/get_example.php3?count=26
basicaly the timestamp is a number which represents the number of secconds since 1/1/1970 00:00:00.
berber