.GP4 file extension - CCITT Group 4 image
What is gp4 file? How to open gp4 files?
File type specification:
The gp4 file extension is also used for some sort of image file used by Comité Consultatif International Téléphonique et Télégraphique, an organization that sets international communications standards. CCITT, now known as ITU (the parent organization) has defined many important standards for data communications.
A protocol for sending fax documents over ISDN networks, the Group 400 protocol supports images of up to 400 dpi resolution.
This gp4 file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
