Translations:GRUB/44/en
From Gentoo Wiki
Installing GRUB as the system's boot loader depends on how the system is meant to boot (through which type of firmware, e.g. on PCs either the legacy BIOS or its successor UEFI) and how the disk on which the boot loader should be installed is partitioned (e.g. on a PC, whether it is using the MBR or the GPT partition layout).