Iirc it stands for “gigabit transceiver high speed” or something. There is also GTX, GTY, GTP, etc which are different implementations of SERDES on Xilinx chips

Iirc it stands for “gigabit transceiver high speed” or something. There is also GTX, GTY, GTP, etc which are different implementations of SERDES on Xilinx chips. It’s like USB full speed and USB high speed. They’re largely meaningless marketing terms just to differentiate generations.