1.SerDes: serdes = serial and deserial, is the serializer and deserializer, which is the general high-speed IO. GTX, GTP, GTH, etc. are all SERDES, but the rates are different. XILINX calls them different names for easy distinction
GTX consists of: serdes+LVDS+PLL+8b/10b codec+winding decoding, not only serdes
SerDes: is a serial/deserializer, also called a serial transceiver
GT (including GTX, GTH and GTP): It is a high-speed serial transceiver formed by Xilinx on the basis of high-speed SerDes, adding other modules, such as 8b/10b codec (for details, please refer to Xilinx related documents, such as ug476). , GT means Gigabit Transceiver, which is the basis for realizing some high-speed serial interfaces: such as PCIe, RapidIO, etc.
2. RocketIO™ GTX transceivers for multi-gigabit serial transceiver designs and proven SelectIO™ technology for parallel I/O enable flexible connectivity between emerging serial standards and existing parallel standards. RocketIO is the GTX logo