In order to use kml file in Google Map Maker, you need to follow the steps below.
Launch your browser then go to: maps.google.com |
Click on you custom maps then copy link address.
Open a new tab then go to: mapmaker.google.com then click the gear icon then select "Labs"
"Enable" Overlays then save.
Click on overlays then paste your kml file link then click add and ok.
This overlay will show you your custom map. enjoy adding and sharing the your local knowledge with the world.