The GBX operates as a butterfly-style loop service, comprising two interconnected sub-routes: one linking Germany with Finland, and the other connecting Germany with Poland and Lithuania.  

Revised GBX Rotation (effective as scheduled):  

Bremerhaven → Wilhelmshaven → Hamburg → Kotka → Helsinki → Bremerhaven → Hamburg → Klaipėda → Gdynia → Bremerhaven  

Resource.: https://mp.weixin.qq.com/s/bStSqccXPFOztsCg5_uPXQ