"Zigeunerweise"--certainly Germans are well aware of Gypsy music! Beethoven knew about Gypsy violins, and I understand used the style. Germany is near Hungary and the Czech Republic, and not all that far from Romania, and borrowed a lot from them.
Gypsies frequently are musicians and preserve the music of the people around them, notably in Scotland and England, and in Spain--so far as I know--they even created a national style. But I hadn't heard anything like that about Germany, and from what little I do know it seems improbable. Maybe I'm wrong; I've got lots to learn, and if there is such music I would be interested in knowing about it.