Hi,
To clarify: It's not an ILS approach. It's an LOC DME approach. LOWI is very special and you need a certification for landing there. You can check the charts and procedures published here: https://eaip.austrocontrol.at/lo/210326/ad_2_lowi.htm
You will see, that there is no ILS approach. The GP is just for support but due to the steep valley it's not reliable. And if you really want to have fun, you can try the visual circling to runway 08.
Rgds
Reinhard