In fact I was working on Rotators yesterday (just finished my EQ8 setup literally two days ago). So in a week or two, the rotators shall be integrated nicely with Ekos in both the capture and align modules. In Align module, you can use "Load & Slew" to solve an image, and once it reaches the target, it can even automatically rotate the camera to exactly match the orientation of the input image.
Oh okay, this is a different rotator from Optec Gemini, I confused the two. So yeah a new INDI driver must be developed for this. I assume you have the rotator? If yes, I need remote access to it to develop the driver.