When using GPS coordinates questions the GPS coordinates are shown on the map, to see the map on the web go to the Report menu and select Map, above the map there is the option to select a survey registrations and survey questionnaires. When you selected a survey registrations and survey questionnaires the GPS coordinates, Polylines and Polygons are shown on the map. 

Lets assume we have registered farmers with their GPS coordinates, name (grower), location and Field registration number and we want to add this information to the Markers on the map such that when you click on the marker it will show the farmer/grower information. This can be done by going to the Survey Creator for the registration (Select Registration under the Registration menu) and set in the properties of these question the value for Shop in map to show this value in the map, see figure 1 below.

 

Figure 1, Show in map settings

 

When you open the map as shown below and click on one of the GPS coordinate marker you will see a popup with the tag data and the GPS coordinates and in the Data panel on the left all the data for the questions for which the Show in map settings were set.

 

Figure 2, GPS coordinates in the map