| 1864 | The first section of the network was built by the "Thiel, Goldwied und Hadlich" company to be used by horse-drawn omnibuses on Gdansk-Sopot route. |
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| 1873 | The first horse-drawn tram line was created. |
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| 1891 | The Company "Danziger Strasseneisenbahn" was created. |
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| 1895 | All tram lines were modernized. By the end of 1896 all single-horse tram tracks were electrified. |
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| 1899 | A company called "Danziger Elektrische Strassenbahn" (Gdańskie Tramwaje Elektryczne) is created in the Nowy Port district. |
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| 1903 | "AEG" and "Danziger Elektrische Strassenbahn" amalgamated into a joint-stock company called: "Danziger Elektrische Strassenbahn AG". |
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| 1926 | The first bus line (Gdansk to Sopot) was created by the tram company. |
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| 1942 | The joint-stock company "Verkehrsbetriebe Danzig - Gothenhafen AG" was set up; it also included "DES AG". |
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| 1945 | The City Transport Company was created, all the infrastructure was rebuilt and trams were operated again. |
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| 1951 | A new company is established called: "The provincial Transport Company Gdańsk-Gdynia" ("Wojewódzkie Przedsiębiorstwo Komunikacyjne Gdańsk-Gdynia WPK G-G"). |
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| 1969 | The first trams of type "102N" appeared on the streets of Gdańsk". |
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| 1989 | "WPK" was devided. In Gdańsk a company called "The City Transport Enterprise-Gdańsk" ("Przedsiębiorstwo Komunikacji Miejskiej") was created. |
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| 1991 | This company was transformed into a joint-stock company of Gdańsk ("The City Transport Company in Gdańsk") |
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| 1996 | Two new trams of type "114Na" (11% low floor) were bought. |
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| 1997 | ZKM introduced new Neoplan low floor-buses (11 buses type of 4020/3 and 23 buses of 4016). |
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| 2004 | The act establishing the "City Transport Company Gdańsk Ltd" (ZKM w Gdańsku Sp. z o.o.) was signed. |
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| 2006 | 33 new "Solaris" low floor-buses were bought by ZKM w Gdańsku Sp. z o.o. |
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| 2007 | The first trams of type "N8C" appeared on the streets of Gdańsk. |
