Revolver Discussions
Here’s a few good pictures of the sights:
Ruger GP100 in .22 LR - The Firearm Blog
American Rifleman | Tested: Ruger GP100 10-Shot .22 LR Revolver
On mine, the front (dovetail, push adjustable) is off center to the right... and the rear (screw/tool adjustable) is off center to the left...