Multi-gigabit transceiver

A multi-gigabit transceiver (MGT) is a SerDes capable of operating at serial bit rates above 1 Gigabit/second. MGTs are used increasingly for data communications because they can run over longer distances, use fewer wires, and thus have lower costs than parallel interfaces with equivalent data throughput.

Source: Wikipedia — Multi-gigabit transceiver (CC BY-SA 4.0)