What does GPT stand for?
GPT stands for GUID Partition Table. The modern partition table that replaced MBR, supporting disks over 2 TB and up to 128 partitions in Windows, with a backup copy of the table for recovery. Booting from a GPT disk requires UEFI; legacy BIOS boot needs MBR.
GPT is the modern way of recording how a disk is divided into partitions. It is part of the UEFI standard and replaces the master boot record. It addresses disks far larger than 2 TB, allows up to 128 partitions on Windows without workarounds, and stores a second copy of the table at the end of the disk, protected by checksums, so a damaged table can be repaired. A PC that starts in UEFI mode boots Windows from a GPT disk.
GPT in practice: an example
A technician installs a 6 TB drive in a workstation and initializes it as MBR out of habit. Windows shows only about 2 TB as usable. After the empty disk is converted to GPT, the full capacity is available as a single volume.
What GPT is confused with
GPT vs MBR: what is the difference?
MBR is the older scheme: at most four primary partitions and about 2 TB per disk, used with legacy BIOS boot. GPT removes both limits and is used with UEFI boot. What MBR stands for
GPT vs generative pre-trained transformer: what is the difference?
In artificial intelligence GPT names a type of language model. In hardware, storage and operating system questions it means the GUID Partition Table.
Which exams cover GPT?
GPT is on the official CompTIA acronym list for one of the four exams covered here.
- A+ 220-1201 and 220-1202: 220-1202 1.0 (Operating Systems). Listed there as “GUID [Globally Unique Identifier] Partition Table”.
Each number is a CompTIA exam objective and the name in brackets is its domain. The exam puts the term in a scenario; it does not ask you to recite the expansion.
Check yourself: two practice questions
Written by CertSprint for this page. They are not taken from any exam.
1. A new 8 TB disk must be used as one volume in Windows. Which partition style is required?
- MBR
- GPT
- FAT32
- Basic MBR with four primary partitions
Show the answer
B. GPT. MBR cannot address more than about 2 TB of a disk. GPT has no such limit in practice.
2. Which feature helps a GPT disk recover from a damaged partition table?
- A backup copy of the table stored at the end of the disk
- A limit of four partitions
- The boot code in the first sector
- The drive letter
Show the answer
A. A backup copy of the table stored at the end of the disk. GPT keeps a primary and a backup table with checksums. MBR has a single table in the first sector and no copy.
Sources: Microsoft Learn: Windows and GPT FAQ; Microsoft Learn: Initialize new disks. The acronym and its expansion come from CompTIA's official acronym lists, linked from each exam glossary above. The explanation, example and questions are CertSprint's own, checked against these sources on 11 November 2026.