Personal gifts have different meanings in different cultures.
In Central Europe, you are not expected to give gifts in this situation. First, to be acceptable, the value of a gift in Central Europe needs to be small and clearly symbolic. Otherwise it would fall under bribery regulations and put the receiver into an embarrassing situation. Even without fear of regulations, giving a gift creates a difficult situation for the recipient. So, giving a gift to a superior or supervisor is just not a good idea.
Second, it is much more common to do something for your new colleagues. If you'd be working in construction, you might be expected to pay for a round of beer for new colleagues, but in Academia, this is not customary at all. So, bringing a box of candy or tea or coffee from your home country, as long as the value is small, for the socializing events that are common (e.g. 10 am coffee, afternoon coffee) is acceptable but not expected. It will make everyone else uncomfortable because they now have to do the same thing, or maybe not, or maybe yes. So, you'd have to make up a story, like your Grandma insisted or you do not like tea and someone gave it to you, ...
Since you have to pack and since the only way for a mitbringsel to be acceptable is something small and personal, that you can describe as purely coincidental, I would not bother.
Once you have established relationships, things are slightly different. For example, if you have a home visit, you can ask whether you should bring something and your professor can pay for it. It is more acceptable but still not appropriate for the superior in the relationship to give a token gift to the inferior.
People in Academia are used to traveling and know about cultural differences. So, if you were to give a gift, they can probably handle it and will not hold it against you. Usually, you will find colleagues that are willing to help you navigate culture. Once you arrived, ask them what the customs are. In Central Europe, there is a sense of solidarity among co-workers that need to stick together.