Thanks to this world map that shows the density of people with the surname Gache in different countries, you can get an idea not only of the popularity of the surname Gache in each country but also of the different migrations of people surnamed Gache.
The quantity of people with the surname Gache that we can find in each country can help us discern the origin of the surname Gache, as logic tells us that the place with the most people surnamed Gache will be the country or area of origin of the surname Gache.