As stated originally in #37599, it would be nice if the GradientPicker component allowed its consumers to pass a custom ColorPicker to be used instead of the default one. This would also, for example, allow the enhancements proposed in #38065 to be applied to the GradientPicker as well.

Currently, that is not possible since the ColorPicker is imported privately by one of the descendent components of GradientPicker:

GradientPicker
  +-> CustomGradientPicker
      +-> CustomGradientBar
          +-> ControlPoints.InsertPoint
              +-> ColorPicker

The easiest solution would be to expose a render prop on GradientPicker and propagate it (prop drilling) all the way down the chain, although it'd be interesting to investigate any other options that would result in a "cleaner" code.