Where did the Goths, Vandals, and Gepidae settle before their later migrations?

Before their later migrations, the Goths, Vandals, and Gepidae are believed to have originated in southern Sweden.12

In the closing centuries BCE, these tribes migrated from Scandinavia to the southern coast of the Baltic Sea, occupying the region roughly between the Oder River on the west and the Vistula River on the east. Specifically, the Gepidae are noted to have lived on the southern Baltic coast in the 1st century CE before continuing their migrations. By the second half of the 2nd century CE, these peoples began moving southeastward, eventually leading the Goths to the Black Sea region and the Gepidae to the mountains north of Transylvania.123