You can find this chache on foot (2,3 km one way) or get yourself a ticket for the tram (EUR 2,00) and make a comfortable journey through Gmunden.
With just a little attention everything should be easy to solve from inside the tram - apart from the first and the last station.
Park your car near the main train station (see header coordinates) and solve stage 1 before buying your ticket.
Stage 1 - Hauptbahnhof
At the very end of the tram you'll find a sign high above.
The number of colours of the painting show A
Stage 2 - Grüner Wald
Here you'll find a house with 2 house numbers on it's garden fence.
The sum of both numbers yield B
Stage 3 - Kraftstation / Gmundner Keramik
Here you'll find a high tower showing the time.
Count the letters which can be found below the time and you'll get C
Stage 4 - Rosenkranz
The station has got the same name like the street next to it.
You may not enter this street by car.
But those who may, are only allowed to do this with a maximum speed of D
Stage 5 - Tennisplatz
At this station you will find E platforms.
Stage 6 - Oberbaurat
You'll pass an arcade house between Tennisplatz and Kuferzeile.
Above the main entrance there is an inscription in honour of Governement Building Officer Dr. h. c. Ing. Josef Stern
In front of the main entrance there are F arches.
Stage 7 - Kuferzeile
Diagonally opposite the station (towards the main station) there is the house Kuferzeile number G
Stage 8 - Bezirkshauptmannschaft
Right in front of the administration building there are H flagpoles.
Stage 9 - Franz Josefs Platz
Here you'll find a clock without a clockwork. Count the letters right above the clock face and you'll get I=14
In order to be able to find the cache you now have to walk a little bit further.
V = C - A - E - F
X = G + I + B
Y = H + D + A
Z = D + F + C + B
N = 47° X.VX
E = 013° Z.AY