Never use the train station as an indication of whether a place is worth seeing. Most train stations in Austria tend to be in the less pictureque parts of town, i.e. not the particularly pretty areas. Seeing the industrial plant in the background can put you off but its worth wandering into the centre of town and to the lake front.
As always, when arriving at a new Town, we wonder where we can park our Car.
At Gmunden, there was no problem at all. We arrived via the Shamsteiner strasse  and found a long row of car parks along the edge of the road and lakeside. The tree-lined pathway led to the town centre.
There were plenty of parks, so we took one, bought the park'n pay ticket, put it in our window and were on our way. Easy!
A great way to explore the Traunsee and other towns on the Traunsee from Gmunden is to take the ferry that stops along the various towns on the waterfront. Service is very limited in winter but is quite available in the summer. Some towns are serviced all year round because there's no better public transportation connection from the train stations in Gmunden and Ebensee. Some of these Ferries are also used to host special events and you can have a party on the boat while navigating the Traunsee.