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Gateway domain

Similar to doorway domain.

Gateway page

Similar to doorway pages.

Gibberish

Web site content that has no logical, sensible meaning when viewed by site visitors.

GIF

The GIF image format is widely used on the World Wide Web. It was initially used by Compuserve to compress images for display on its online services. GIF uses a loss-less compression algorithm based on LZW. LZW is patented in some countries. A new standard, PNG, uses similar, non-patented compression algorithm and supports a wider range of image types including full colour images. PNG is well supported in recent software.

GUI

A Graphical User Interface (GUI) is a computer interface which consists of visual controls such as menus, buttons and windows. The alternative to a GUI is a console or command-line interface, where the user must type commands as text rather than using visual controls such as menus and buttons. A GUI is widely regarded as easier to use, but it is much more complicated to create.