I have found about 3 dozen gold targets, mostly rings, and they came in over a large range from foil at about the same reading as a condiment package up through lower zinc about 10 numbers lower than a real zincoln like a decent sized piece of can slaw.
Gold is the ninja of all metals...it is an expert at disguising itself as other things and sorry to say usually trash.
Just about every gold target I dug has been a surprise where I was expecting to dig something else.
The only thing I can tell you, and this is not in stone by any means, is that so far all of my gold has been fairly shallow at 5" or less and has come in as a pretty solid signal and not jumpy like a lot of my trash usually does.
If you want to be a gold hunter you just have to wrap your head around the idea of digging most solid signals above iron into lower zinc.
Small thin gold chains and other gold like studs or small earrings might even come in as an iron signal too.
The universe does not make it easy for us jewelry hunters and likes to mess with our heads...a lot.
Look at this pic of a VDI scale off of an older White's unit.
Notice the possible gold range and dig accordingly.