Bryn,??
The setting circles are settable once you have the mount polar aligned you just find an object you can reliably identify then using a planetarium app like SkySafari, Stellarium etc. look up the current coordinates and rotate the setting circles to match. The RA will change anytime you move the mount by hand, remove power or stop the Gemini from tracking but the DEC should remain locked in on the same place if your polar alignment is accurate.??
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Chip Louie Chief Daydreamer Imagination Hardware?
? ?Astropheric Weather Forecast - South Pasadena, CA?
Chip Louie