Is it possible to form an alloy of gold and zinc? I know you can dissolve gold in mercury, but i do not have access to any. Would it be possible to dissolve it in molten zinc instead mercury.
Yes. There are alloys and intermetallic compounds up to $\ce{44\%Au:56\%Zn}$.  This phase diagram is from here.



That said, crystal structure changes with composition, so appearance on solidification might be hard to predict.

Are you trying to emulate Hevesy?