Hi Supriya,
To have multiple locations at the same time on Google MAp Widget please try the following :
In your service add result filed as Info table and add filed you require.
var params = {
infoTableName : "InfoTable",
dataShapeName : "Datashape"
};
// CreateInfoTableFromDataShape(infoTableName:STRING("InfoTable"), dataShapeName:STRING):INFOTABLE(Datashape)
var result = Resources["InfoTableFunctions"].CreateInfoTableFromDataShape(params);
// location:LOCATION
var location = new Object();
location.latitude = 42.452;
location.longitude = -72.124;
location.elevation = 0;
location.units = "WGS84";
result.AddRow({location:location}) // You can Add multiple marker using Add row.
