Hi fossicking,
Dude its hard to tell just from a pic of your rock if anything is nearby.....its so much more involved than that. If it were that easy, we would all be rich!
Sort of like how long is a piece of string?
I know its not what you want to hear.
From what I can see it looks like a piece of discolored quartz (quartzite) but im not sure. If so this is a good sign, but I cant see anything promising in it just from its pic, but obviously from a well known gold bearing area.
Have you run a detector over it, or the surrounding area it was found?
What is the surrounding structure like? Lots of Quartz cap rock?
Your best bet maybe to crush and pan it, then count any colors you may get.
If you get more than 8 specks of color in your pan, its an area worth investigating further.
Regards