I've been wondering how big the cabin of GX6 could be, compared to other MPAs out there.
P-8 has 5 consoles, SC-130J was proposed to have 5 as well, the proposed Airbus A319 with 6, all arranged in a modern single aisle manner. Both come with additional sonobuoy racks, sonobuoy launchers, a small galley, and rest area, observation areas, equipment spaces, and spare room for growth.
From the ZDK-03 cutaway model at zhuhai, we can see that they have about 8 consoles in the main operator cabin with room for growth. Forward of the main cabin, there is what appears to be a gallery, a rest area, equipment consoles, etc. What is lacking, is some space for sonobuoy launchers and rack, as well as observer windows, but those do not require too much length.
If we assume that GX6 uses similar consoles to ZDK-03 arranged in a similar way, with similar equipment racks and a similarly sized rest area, then I think they can quite happily install 5-6 consoles in a main operating cabin with room for 2-3 consoles of growth, with two to three rotary internal sonobuoy launchers, a sonobuoy rack, and dedicated observer stations (which we know exist).