Temat: Darmowy program GIS do użytku komercyjnego
Jak chcesz modyfikować program to ten zapis ma znaczenie zaczyna się bowiem od
2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions:
You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change.
You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License.
If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.)
Work w tym znaczeniu to prace programistyczne czyli na programy podstawie kodu Qgis a nie użytkowanie programu i wytwarzanie danych.
W punkcie 0 masz zapis uszczegóławiający The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does.
Pomocniczo:
Polskie tłumaczenie nieoficjalne:
http://gnu.org.pl/text/licencja-gnu.html