Hi Amer,
Welcome to the forum, and to joining the familiar search we have all gone through.
There are many prospectors based in West Gippy, and no doubt you'll come across some of us sooner or later.
To answer your question, my response will be similar to many like questions asked before on this forum: research, research, research.
Luckily, we now have the internet that has loads of historical and current information about alluvial bearing streams in Gippsland.
Try a general Google for "Gippsland Gold", which will reveal many of the local gold bearing creeks.
Then try searching similarly for the creeks identified.
There is even a search function on this forum, one the top left hand of the screen there is a magnifying glass icon, which when clicked opens up a search function to reveal previous posts on local streams.
That's the easy bit: then starts the journey to try and find that sneaky gold stuff lurking deep under the sand and clays in the steams all around you! And collecting all the gear needed!
Cheers, and best of Luck!
Tricky Dick ( from Warragul)