OK. This is hardly a 'local' gift but nothing in the city will show a total stranger anywhere else in the world that you (or a relative) has been to Gdańsk than a Hard Rock Cafe t-shirt. It's probably fair to say that HRC will do as much to get the name of the city out there globally as anything the local promotions department can do. Find a range of Hard Rock Cafe clothing and souvenirs in the store adjacent to the restaurant on ul. Długi Targ. The classic white t-shirt will cost you 140zł.