I also have 10cm deep (0.76 m height) fiberglass absorbers (Owens Corning 703) on the floor across the front and back walls (spaced 5-8 cm away from the walls), 10cm deep free-standing fiberglass absorbers on the sides and ceiling to help create a reflection-free zone, and 8 diffusers/absorbers (purchased from a reputable company) spaced out on the side and back walls behind my listening position. I have large Rockwool frequency absorbers floor-to-ceiling in the corners of the room. My room measures 4.1 m (width) x 5.9 m (length) x 2.8 m (height) and my studio monitors are pointed down the length of the room. For Room EQ Wizard measurements I used a Behringer ECM8000 pointed towards the ceiling. For GLM calibration and I used the included Genelec microphone. The -stored switch on the back of my montiors is ON.
My understanding of the Genelec GLM system is that the sine wave sweep listens to your room and then automatically calibrates the EQ on the monitors to adjust for problems/imperfections in the room. I tried speaking to my distributer and checked the Genelec YouTube instructional videos and so far I can't find anything I'm doing wrong during my GLM calibration. I've tried using Room EQ Wizard to look at an analysis with a sine-wave sweep and it seems like there is not much of a difference when comparing the GLM on versus bypassed. I've noticed that my mixes don't translate well (WAY too bass heavy or "boomy" when listening in the car). I am a hobbyist and I have a home studio that is fairly well treated and a pair of GLM-calibrated 8341A monitors (no subwoofer).