No. The grip you are looking at at Midway is for the fixed sight 3" GP. This is shorter than all of the rest of the GP and SRH grips.
The adjustable sight GP100 and Super Redhawk have the same grip. If the SRH you buy, has the Hogue Monogrip, you will need the hardware and grip panels that go with the traditional grip as the Hogue mounts using a different setup. I have changed grips on both of my GP100s and changed grip panels on my sp101. Very simple to do if you have all the correct parts.
41magnum has a sticky where he sells very nice hand made grip panels. I have a pair I bought from him for my sp101 that are a work of art.
Also, look at ShopRuger.com under revolver accessories, double action.