Galileo

Galileo is the global navigation satellite system that is being created by the European Union through the European GNSS Agency.

Gatekeeping

A process by which news or information is released by those who control it.

Gateway

A device used to connect networks that follow different protocols.

GbE

GigaBit Ethernet.

GDPR

General Data Protection Regulation.

GGSN

Gateway GPRS Support Node. A wireless gateway that allows mobile cell phone users to access the public data network (PDN) or specified private IP networks.

Ghost Image

Using ghosting software, is a method of converting the contents of a hard drive -- including its configuration settings and application -- into an image, and then storing the image on a server or burning it onto a CD_ROM., so that computers of the same hardware can have the same software setup. Useful when one requires lots of computers to be identical.

Ghost Post

A forum / Social Media entry that has been removed / deleted by the author or moderator.

Ghost Site

A Web site that remains live but is no longer updated or maintained or only done so very infrequently. Unlike a site that is no longer available and results in a 404 error message when the user tries to access it, ghost sites can be accessed even though they have not been updated. Web sites typically strive for relevant information that is timely and current. However, there are some sites in which the content will never or rarely change, so there is no need to update the site.

GIF

Graphics Interchange Format - a graphics file format commonly used to display indexed-colour images on the World Wide Web.

Gigabyte

A collection of data totalling 1,024 Megabytes.

Gigaflop

A measure of computer speed, a gigaflop is a billion FLOPS.

GIGO

Garbage In Garbage Out.

Glonass

Globalnaya Navigatsionnay Sputnikovaya Sistema, the Russian Federation's GNSS, is the Russian version of a global positioning system. Similar to the United States' GPS, GLONASS is owned and operated by the military.

Glyph

In typography, a glyph is an elemental symbol within an agreed set of symbols, intended to represent a readable character for the purposes of writing. Glyphs are considered to be unique marks that collectively add up to the spelling of a word or contribute to a specific meaning of what is written, with that meaning dependent on cultural and social usage.

GML

Generalised Markup Language, is an IBM document-formatting language that describes a document in terms of its organisation structure and content parts and their relationship.

GNOME

GNU Network Object Model Environment. GNOME is part of the GNU project and part of the free software, or open source, movement. GNOME is a Windows-like desktop system that works on UNIX and UNIX-like systems and is not dependent on any one window manager.

GNSS

Global Navigation Satellite System, a satellite system that is used to pinpoint users to a geographic position. See GPS and GLONASS.

GNU

Short for GNU's not UNIX, a UNIX-compatible software system developed by the Free Software Foundation (FSF). The philosophy behind GNU is to produce software that is non-proprietary. Anyone can download, modify and redistribute GNU software.

Gnutella

Gnutella is a large Peer-to-Peer network.

Gopher

The Internet Protocol where files are displayed in a hierarchical menu and are retrieved based on user input.

GOSIP

Government Open Systems Interconnection Profile. There are a European and a US standard.

GPRS

General Packet Radio Service is a data service for GSM networks.  It is expected to allow data transmission speeds to over 100kbps and support IP and X.25.

GPS

Global Positioning System is a US satellite based orbiting Earth system that makes it possible for people with ground receivers to pinpoint their geographic location.

GPU

1) Graphics Processing Unit.
2) Global Processing Unit, is a Gnutella client that allows users to share CPU-resources on P2P networks.

Graymail

email messages that are generally unwanted, but do not fit the definition of spam. Unlike spam, graymail includes messages from mailing lists and newsletters that you have legitimately signed up to receive. Over time, these messages can begin to clutter your inbox and can easily be mistaken for spam.

GRE

Generic Routing Encapsulation is an IP tunneling protocol.

Grid Computing

A form of networking that harnesses unused processing cycles of all computers in a network for solving problems too intensive for any stand-alone machine.

Groupware

Software that supports interpersonal processes and the objects with which people commonly work. Groupware was originally coined to describe a new class of applications designed to provide electronic support for groups of individuals working together toward a common goal.

GSM

Global System for Mobile, is a digital mobile telephone communication system that is widely used in Europe and other parts of the world. GSM uses a variation of TDMA and is the most widely used of the three digital wireless telephone technologies (TDMA, GSM, and CDMA).

GTW

Go To Webinar. Online event / meeting hosting service.

Guard Time

A time interval left vacant (i.e., during which no data is sent) on a transmission channel that can be used for synchronization and/or compensating for a signal distortion. The guard time provides a safety margin against symbol interference in the time between sequential operations such as transmission, encoding, decoding or switching.

Guest Virtual Machine

Guest Virtual Machine, is the software component of a virtual machine.

GUI

Graphical User Interface is used by a program to display its output in a graphical format.