There are a fair number of resources, those mentioned already, i.e. Doug Stone (DS) maps, you can get individual maps of each area in VIC or the cheaper in the long run is to get the book. John Tully (JT) also produces similar maps of various areas to prospect. Be aware, both state that they do NOT imply access or all crown land or what type.
Apart from Miners Den, Coiltek Gold Centre in Maryborough and if you Google detector shops or Gold detectors and ilk, there are others that may stock them.
It also depends on how you want to view the maps, i.e hard copy paper based, computer/laptop or GPS such as Hema. Most of my resources are GPS/Hema, tablet or laptop, but I so have the DS book and some of JTs. Some of the resources I use are;
Doug Stone & John Tully. - Either are a good beginners guide to where gold has been found, but not necessarily permission to do so. Both are reasonable accurate as maps as I've digitised my books to GPS.
Vicmap 1:25k topo - Good for highlighting public land, but a little out of date. But a great aid driving tracks using Hema GPS and finding many areas
Geovic (screenshots then calibrated to GPS) - Good for historical and geological info and can download PDF & print.
Google map (screenshots then calibrated to GPS) - Good for looking at terrain sat images especially surfaced areas. Can be printed
This one I'll treat alone - Parks Web Victoria, here's the link
https://www.parks.vic.gov.au/things-to-do/fossicking-prospecting
Here you can get PDF maps detailing where in those areas you can and can't detect and other info. Here's the list;
National Parks - bendigo, castlemaine, chiltern, heathcote & st arnaud
State Parks - Ararat Hills, Beechworth, enfield, kooyoora, paddys ranges & steiglitz
Re State forest - you can pretty well camp and detect in any state forest, excepting if there is an active mining lease and maybe fire ban or burn off.
Probably not what you need right now, but I also use Ozi3D with all my electronic maps as it gives a good representation of topography (hills n gullies, lol) but you need elevation data to run in the background.
I won't detail other stuff at this point, but they include Geological maps, historical to name 2. By this time you are probably suffering from info overload, my apologies.
