As far as I know, no versions of "The Maxipad" have CV/gate options. However, I reached to fellow owner insky on this matter and this is where he pointed me.
"The MIDI JACK II from Synhouse is what you want to use to midi your 800DV. Although it doesn't claim to support the 800dv they explain in their site that it will work for the 800DV, but it will not be able to play duophonically."
Haven't ordered it yet but I want to. I think I'll let a tech handle the job and go over the synth as well. BTW, it took me about a year and half to find this rare beast but wow, does it sound amazing!
Voyager, JP-6, Pro-One, 800DV, CZ-101, VL-1, Micron, Solina, OB-Xa, JX-8P, Sid Station, xoxbox