Can you elaborate? Currently there is CSS -> Set Gradient Background for creating CSS gradient backgrounds, but I'm not sure if that's what you're looking for.
I am aware of the "Gradient Assistant", but it's limited to simple 2 color gradients.
What Im thinking of is something like Ultimate CSS Gradient Generator or EnjoyCSS. Both allows you to set an unlimited number of color and alpha stops. EnjoyCSS also supports creation of layered CSS patterns.
There are 10 types of people in the world: Those who understand binary and those who don't.