Same. I'm putting gm-800 in the fx loop of sy-1000. Use the sy-1000 for 3 instrument modelling paths mainly (maybe some synths if needed for layers) and the gm-800 will go directly on the guitar path inside gm-800, and i can also run wireless to my line 6 helix for guitar related stuff if needed.
Alex from Roland at the end of one of his videos -he shows you how to export patches from Zenology Pro and load them into the GM-800 via usb thumb drive.I'm seeing annual rates for 4 different access levels of Roland Cloud, nothing about lifetime access for a one time price.
It looks like Zenology Pro is their software synth plug in that has the historical catalog of all Roland synths. But are the sounds and patches of Zenology Pro something you can load into the GM-800? Or only make use of when playing the plug in?