What functions are compatible with GPU Image Processing?

I am runnning a series of functions from the Image Processing Toolbox to clean up my images of background. I am trying to count cells across thousands of images that are really tightly packed together. I am running into a computation time problem. I can convert most of the functions to analyze the images on the gpu but some are not compatible. I begin having problems when I convert the image to a binary image. I am using the following functions

im2bw(); dwdist(); watershed(); imextededmin(); imimposemin();

Is there an equivalent to these functions that can be processed in the GPU?

Best,

Ryan