I say yes as well, AS long as gold has been found in the immediate area in the past.
The reason I say yes is in the first picture it appears to be mineralised quartz, gold is often found in such quartz, in your second picture as well as also in the first picture it appears to be quartz and country rock with pyrite in the contact zones of the quartz and country rock, gold is found most often in the contact zone of country rock and quartz, gold is also often found in pyrite, the third picture I can't make out anything that would catch my attention, but it may if I saw it in person.
The term "country rock" is not any particular kind of rock, it is a term referring to the most common bedrock in an area.