In this world map, you can check at a single glance which countries have more people with the surname Gacek. As you can see, it's effortless to notice which countries have a higher number of people carrying the Gacek surname.
Thanks to this world map that shows the density of people with the surname Gacek in different countries, you can get an idea not only of the popularity of the surname Gacek in each country but also of the different migrations of people surnamed Gacek.