I offer you twin room appartment (55sqm) with huge terrace (45qm) !
Bedroom with king-size bed, living room with big fold-out sofa. Max accomodation for 4 persons.
Seperate, well equipped kitchen. Underground parking space for one car included.
Old Town and Main Train Station are about 20 minutes away by bus/tram but I recommend to use Uber or Taxi - you will only pay 3.5 EUR one way and the ride will be like 5-10 min depending on traffic.
Gdansk Lech Walesa Airport nearby.