I checked the detail design log in my current game and I've got the same thing as Muad89 - it does seem like the bonus from GR optics is not being applied correctly.
Here's the log for my latest model and you can see the GR super charger tech is doing stuff but the GR optics (which I got before the GR supercharger) appears to be doing nothing with a value of 0.

- GR_optics.png (2.63 MiB) Viewed 406 times
Seems like GR optics is either not displaying correctly or simply not working.