I wouldn't think that the two would fit together simply because it will cause too much wear on the models. X-Wing minis are fairly sturdy for as delicate as they are, and the paint is fairly robust too, but docking and launching the Phantom over and over is going to strip off paint and start wearing off wing detail pretty quickly.
I doubt they fit together, but I imagine it is more due to cost. Now if I played rebels I absolutely would magnetize them and dock/undock all the flipping time. You may have to repaint occasionally, but with a matte sealant it should be fine, besides if the paint scuffs it adds some character (and the docking coolness factor far outweighs scuffed paint). When I get my Gozanti I will have to magnetize it so I can dock my fighters
The Gozanti is already capable of carrying fighters. We know that. It was in the announcement.
The K-Wing is capable of dropping a bomb after moving and then SLAM away. It was in the announcement.
OH WAIT....



