i am actually using a Compex WL54G wireless card with the GTDriver and KisMAC (working nicely by the way, thanks!) and it does have an external antenna connector (MC card style connector)... i forget off the top of my head what the card is recognized as... Intersil something. i think i bought it from amazon.com
thanks again !!!
there is no GT card with antenna connector that i know of. however the 3com card has internally a hirose connector.