After initially serving in the far north during the Finno-Soviet Winter War, she was redeployed to Southern Norway, escorting ships through Norwegian territorial waters.

During her time in German service, she escorted the evacuation ship Wilhelm Gustloff when the latter was torpedoed and sunk by a Soviet submarine with heavy loss of life.

[7] When the invasion came Gyller was docked at Kristiansand and got her first warning of the war in the form of gunfire from Odderøya Fort against the attacking German landing force number four.

After receiving an orientation on the situation from the fort commander Gyller steamed out to the harbour entrance and swung out her torpedo tubes to confront any intruder.

This order, combined with confusion of which flags were flown by the intruding warships, led to the German force being able to enter the harbour unopposed on their third attempt at 10:30.

Löwe was the single warship accompanying the evacuation ship Wilhelm Gustloff at the time the vessel was torpedoed and sunk by the Soviet submarine S-13 on 30 January 1945.