Midi Guitar 2 virtual out to GarageBand with Quad Cortex USB

Hello all.
Looking to communicate with anyone using Midi Guitar 2 app on an iPhone with the Quad Cortex through the USB port.
I can access all sounds available in Midi guitar 2 through the Quad Cortex but am not able to see USB output options in Garageband to bring those sounds into the Quad Cortex. I am trying to do this without using the head out of my iPhone. Any ideas greatly appreciated.
I am using Virtual midi as well in Midi Guitar 2