Ok, that is better

There are two things which you have to take care of when using GC

• all bump maps, displacement maps, transparency maps and specular maps need to be set at gamma 1.0 UNLESS that same image map is used for the diffuse channel - in that case leave it as is

 

• If you use an IBL map and you change the gamma of the map, light needs to be redone since the IBL map now produces different light. An HDR or EXR map should be 1.0, others 2.2. So it this changes in your case, tone down the lights

Hope this helps