GIF:
(Graphic Interchange format) GIF images have very small sizes. It displays 256 colors. GIF is the most widely used graphic format on the web.

Glow:
Surround an image by soft or bright highlighting.

Gradient:
Gradual transition of colors is called gradient. Gradients create dept and special effects like metal etc.

Graphic design:
Art of communicating a message, idea or concept visually through text, images and various designs.

Grey scale:
A color mode in which Black and White colors and in combination. Grey Scale, as the words tells us, has various shades of Grey, Black and White.

GUI:
Graphic User Interface allows user to use graphics, picture and icon instead of text.