GMII to RGMII v4.0 5 PG160 JChapter 1 Overview The GMII to RGMII IP core provides the Reduced Gigabit Media Independent Interface (RGMII) between Ethernet physical media devices and the Gigabit Ethernet controller in Zynq®-7000 SoCs, Zynq® UltraScale+™ MP SoCs.