Part of the screen can be in 640x200 mode and part of it can be in 320x200 resolution. Such split modes are sometimes used in paint programs, where the menu bar is in 640x200 while the graphic is in 320x200. The card is capable 1024x768 resolutions with an SVGA monitor. The Apple IIGS also has all the graphics modes found on the Apple IIc. Characters are formed by a 7x8 pixel matrix.
Text mode is monochrome but can be set to a specific color.
The background and boarder can each be set to different colors. 80x48 pixels in 16 colors. 560x192 pixels in 16 colors. The text in mixed mode can be either 40 column or 80 column. The Apple IIGS uses the 32 channel Ensoniq 5503 DOC wavetable sound chip used in Ensoniq's Mirage and ESQ-1 synthesizers.