GPT stands for GUID Partition Table. It is a partitioning scheme used on a hard disk drive that defines the layout of the partition table and the structure of the disk. GPT was introduced as part of the UEFI standard to replace the older MBR (Master Boot Record) partitioning scheme.
GPT provides a number of advantages over MBR, including support for larger disk sizes (up to 9.4 zettabytes), a more flexible partitioning scheme, and better data redundancy and recovery options. GPT also provides a backup partition table at the end of the disk, which helps to ensure that the partition table is not lost or damaged.
GPT uses unique GUIDs (Globally Unique Identifiers) to identify each partition on the disk, which allows for a virtually unlimited number of partitions. This is in contrast to MBR, which is limited to a maximum of four primary partitions or three primary partitions and one extended partition.
GPT is now the preferred partitioning scheme for modern computers and is required for systems using UEFI firmware. It is supported by all major operating systems, including Windows, Linux, and macOS.