I have a Graphic View II (it was my first LF camera, and I still like and use it, but not in the field anymore). I really like the Fresnel viewing screen that came with the camera. It's hard to tell from the photo if you have a Fresnel screen or not. If not, regular ground glass is dimmer. Many prefer regular ground glass because the illumination is more even. In any case, make sure your lens is set at its widest aperture for viewing and use a good dark cloth.
If the ground glass is dirty, a gentle wash in mild detergent will often do the trick. However, if you have grid lines on your ground glass, be sure to test them for solubility before washing. I've washed the lines right off of one ground glass
Best,
Doremus