The plumbing for the guest house shower has been done for a long time, as have the interior shower walls and the base. Today, I finished the shower by adding the glass walls and glass door. The installation was fairly straightforward; I simply had to anchor in railing on each wall and then slide the two glass panels into place. After that, an upper and lower bracket connected them and formed the door frame, and the door itself was attached with two hinges that were already anchored to the glass wall.
The other bathroom fixtures (vanity, sink, and toilet) will come once the floor is done, but here is a preview of the vanity that I plan on installing (sans the ugly hardware on it in the floor model at the Home Depot):