I don't really see any benefit from doing that. The GPS antenna is brittle, and would crack easily.
The other DJI GPS units come in a plastic housing anyway, so it must not be too difficult to penetrate.
Also, the GPS must be installed facing a certain direction, that's why the top shell has the red stripes near the motors,
that match up to the bottom shell, so you don't install it 90 deg. out of time.