GMS-632x
The GMS-632x Host Extender module adds USB Host functionality to either the GMS-632 USB/MIDI/CV Interface module or the GMS-634 General Purpose Programmable Interface modules.
The module also expands the number of analog inputs by two, each input equipped with a CV attenuator. When the input is not used, a reference voltage is applied to the attenuator so that it can be used as a control input.
The module also adds two additional gate inputs. Both USB ports may be used simultaneously.
It is supplied with a short jumper cable that connects it to the host module.
The unit is available in black anodized with clear aluminum graphics or clear anodized with black graphics.
http://www.groveaudio.com/pt/blog/
No info about availability.