Game Input MultipleXer

Looks like we are getting closer to having an official kb/m for ps4. Are the gimx devs considering emulating that when it comes out?

So we can use what ever kb/m we want and have it fool the ps4 into thinking it's official?

I guess you are referring to the TAC Pro by Hori.
The mouse probably plugs into the keypad, and the keypad plugs into the PS4.
In the image below, I clearly see two cables on the keypad:

The keypad is probably seen as a gamepad by the PS4, and this is not different from currently available MKB adapters.