The week-long tours will take travellers from Berlin to Vienna, or vice versa, stopping in Salzburg, Munich and Nuremberg. Prices start at £1,099pp and £1,149 for the reverse itinerary.
Brian Young, managing director of G Adventures, said the operator is "incredibly excited" to launch the festive tours, which will "help travellers recapture the magic of Christmas, and celebrate with loved ones and new friends".
"Christmas 2020 was incredibly tough, with Covid restrictions meaning many families and friends were unable to spend the holiday season together," he added.