Here are several Gibb River Road Maps.
The first two maps give you an overview of the area and show where all the main attractions and gorges are.
Below those you can find a recommendation for a physical map of the Gibb River Road.
If you have no idea where the Gibb River Road is at all, look at the simple map below, showing the north western corner of Australia:
The Great Northern Highway leads up the west coast to Broome and then skirts the southern edge of the Kimberley. The Gibb is a short cut right through the Kimberley and connects Derby near Broome on the west coast with Kununurra in the East Kimberley.
The road out of Halls Creek is the Duncan Road. (The Tanami Road is not shown in this map.)
Here is a more detailed map of the Gibb, showing all the attractions and gorges:
This map is also included in my free Kimberley guide, which gives you a really good overview of absolutely everything there is to see and do in the Kimberley, when to best do it, how to, and more.
Here is the page that lists all the driving distances for the Gibb.
If you want a really good physical map of the Gibb River Road you can't go past the HEMA Kimberley map.
I already recommend it as the best overall Kimberley map on another page, and on that page you can find out why:
Kimberley and Gibb River Rd. Map