Not really -- the Dacians/Thracians/Getae were a separate sister-branch of the Indo-European family. As you see in the figure below, this is sandwiched between the Hellenic and Albanian families
The Galatians were invaders in the 3rd century but the Dacians are attested to far before that -- right from the Greek histories of the Thracians.
There isn't such a big deal though -- all of them were Aryanic peoples: Italics or Greeks or Thracians or Celts or Slavics or Germanic/Nordics or Baltics or Albanians or Anatolians or Iranis (Scyths/Sarmatians).