I would disagree with those, so far, who are telling you that gold is going to read in the low TID zones (tab, foil, etc...). The truth is, gold can read anywhere on the TID scale. The only reason the popular mantra is that "gold reads low", is the following: a) The normal size of gold we find, is ring and coin-sized items. Right? and b) that gold is alloyed with other metals, thus making it 10k, 14k, 18k, etc.. Rarely ever is jewelry made of 22 or 24k.
Gold in and of itself (like a 24k gold amulet or ring) is actually a very high conductor. It's only when you add the alloys that the conductivities drop. But even THAT doesn't automatically mean that each gold item will be a low conductor. Because size plays into it.
Let me give you an example: Take an entire aluminum can and wave it in front of your Garrett. What does it read? Up at quarter or half dollar, right? Ok now take a small snippet of that same aluminum can (or just use the tab) and see how that reads. Reads down at tab or nickel or whatever, right? BUT WAIT! At NO time did the composition of the object change. In each case it was still the same ALUMINUM. Ok then, what changed? Merely the size

So too is it with gold. I gaurantee you that if you find a big enough honkin mans ring it will read up to the zinc penny range. Or an entire gold bar might read at silver dollar or overload, etc....