The G-O-Road starts just after Torquay and takes you right through to Lorne, Apollo Bay, Port Campbell, Port fairy, etc on really nice roads, twisties etc...u dont really need a map!
After Torquay you will passs Anglesea then Aireys Inlet - Aireys has a nice little turn off where you could checkout the old lighthouse...plenty of sight seeing along the way too - no suburbia once out of torquay area.
Its great. Phillip Island is good too! Through the dandenong ranges is good, Black spur up to warbuton is great, there are heaps.
I think there is a website that lists these kinds of cruises / drives...