Adding information to .gif files

[jvg56]

Hey, does anyone know how to add information to a .GIF image, e.g. circle?color=blue ?
I don't know what to google... :$

Thanks in advance

 

[Pure]

This is done via PHP GD imaging, using the $_GET function to change the colour.

You must be registered to see links

 

[jvg56]

This is done via PHP GD imaging, using the $_GET function to change the colour.

You must be registered to see links

Ty