The PHP package I downloaded using the link on the page at http://www.aprelium.com/abyssws/php5win.html does not include the GD library.
phpinfo() reports that it is release 5.3.6 and I downloaded and installed it around January 25, 2012 - that's the creation date on the directory into which I installed the package.
I am basing my statement that it does not support GD upon two things -
1) the output from phpinfo() contains nothing about it and doesn't even contains any text with "gd" in it - I used Firefox Find to search for gd and it was not found.
I guess not finding anything with gd in it is not that strange as I doubt there are any words in the English language that contain a G followed by a D expect for acronyms and mnemonics, which I suppose you can't accurately call "words."
2) Code to look for one of the GD functions tells me it it not found.

if(!function_exists('imagettftext')) {
    echo ('Error: Server does not support PHP image generation') ;
    exit;
}

The echo is executed.
I see that the current pre-configured copy of PHP is 5.40 and the comments on http://www.aprelium.com/abyssws/php5win.html say

Support for mbstring, cURL, GD2, IMAP, GetText, LDAP, OpenSSL, PDO, ODBC, SQLite, MySQL, and MySQLi is also turned on by default.

My questions are:
Is freetype also included in the 5.4 release?
Can I simply install the updated pre-configured package on top of the existing one?
If not, what procedure should I use?
Your assistance will be appreciated.
This next question has nothing to do with programming or computers - except that it might keep you, or someone else, alive to continue working and using computers.
Do you know that you can have a heart attack without chest pain, shortness of breah, or any of the other "classic" symptoms?

Well, you can and I've had two heart attacks with atypical symptoms
Go read about the first one at:
http://www.healthboards.com/ubb/Forum61/HTML/000737.html
The life you save may be your own!
Women - you are more likely to have atypical heart attack symptoms than men.
I tell people that if you have pain you can account for or if you have multiple areas of pain, go to the ER.
One more thing - to those responsible for the Abyss server and for providing a free version of it - THANK YOU!