Gaelio gives Duo a slightly puzzled look for just a moment. Far more male than female children were given the surgery so wha- oh. His expression shifts to one that is briefly disapproving, but a tightness in the corners of Gaelio's mouth suggests he finds it at least a little funny.

"It's an implant that allows the pilot to connect directly with a mobile suit - anything from a Gundam to a worker - to allow information upload directly to the brain." Maybe it has a different name for Duo's time?