No, it doesn’t seem to be. Nuendo ignores all the gamma settings.
What I’ve done is setup my second monitor for video playback. This second monitor only ever displays full screen video. Anything else looks over saturated and too dark. I opened the same video in QT on my main monitor and then ran video in Nuendo on the ‘video’ monitor and then adjusted the overall monitor settings to correspond to the video in QT on my main monitor.
It’s a PITA, I wish Steinberg would solve this one…