GPT
also: GUID Partition Table
GPT is a partitioning scheme for hard drives and SSDs that uses a GUID Partition Table to organize disk space into partitions, supporting larger drives and more partitions than the older MBR standard.
GPT (GUID Partition Table) is a modern disk partitioning standard that replaces the legacy Master Boot Record (MBR) scheme. It stores partition information in a structured table and uses globally unique identifiers (GUIDs) to label partitions, making it more robust and flexible.
GPT supports disks larger than 2TB, allows up to 128 partitions (compared to MBR's 4 primary partitions), and includes built-in redundancy by storing partition tables at both the beginning and end of the disk. Most modern Linux distributions and systems use GPT by default.
You can check your disk's partitioning scheme using sudo parted -l or sudo gdisk /dev/sda. When installing Linux, the installer typically offers to set up a GPT partition table automatically on new disks.