Probably best to bring this up in the Gemini2 forum, although you have probably already done this.
I don't see why it would have goto accuracy issues unless the pointing model data is poor or not working properly or don't have a model east and west. I do remember some Gemini 2 discussions about goto accuracy issues (not sure I have hGemini1) but thought this was an issue with some handset (system) settings and could easily be fixed.
Typing in "goto accuracy" in the Gemini forum bring up a lot of posts such as regarding goto accuracy....ie: Quote...
"When you start up the Gemini and brings up screens. On the screen that has, like mount parameters and has hand controller as one of the options that you can select. Here you can select different settings, ramp-up, etc. And some others which I don't fully understand but they are there. I think that Tom talks about that on his website. Losmandy told me that I had the wrong option selected". ...end quote
Ok this is not informative but maybe trolling the G2 yahoo forum and FAQs will help.