How To Create A Halftone Effect On Part of An Image or Color?

[Frankwpb1970]

Is there a way to create a partial halftone effect on an image( almost like a halftone gradient ) or color?

I have seen several designs where there is halftone effect in certain areas of an image however not the entire image and was curious if there is a way to create this design effect with GIMP?

Thank You.