In 1810 the children and Caroline moved to Vienna, where Wilhelm acted as ambassador until 1814.

As a successful diplomat, Bülow spent most of his life in London – he was appointed ambassador in 1827.

Gabriele spent 1828 to 1836 in London with her husband, where her portrait was painted by August Grahl in 1831.

Although she was the last surviving heir of her father, particularly to his estates in Tegel and Burgörner, she lived a very modest life, in contrast to her mother, though still in contact with major figures of her time – for example, she acted as chief lady in waiting to William I's consort Augusta at William's coronation.

Her 81st birthday in 1883 was chosen as the occasion for unveiling the two Humboldt monuments in front of the University of Berlin.