"geometry":{
      "type":"Polygon",
      "coordinates":[
         [
            [
               -69.899139,
               12.452005
            ],
            [
               -69.895676,
               12.423015
            ],

public static final class Coordinate {
        public final double[] coord;

        public Coordinate(double[] coord) {
            this.coord = coord;
        }
    }

import org.apache.commons.lang3.ArrayUtils;
import com.google.gson.Gson;

public class Scratch {
    public static void main(String[] args) throws Exception {
        String json = "{" +
                "   "geometry": {" +
                "       "type": "Polygon"," +
                "       "coordinates": [" +
                "           [" +
                "               [-69.899139," +
                "                   12.452005" +
                "               ]," +
                "               [-69.895676," +
                "                   12.423015" +
                "               ]" +
                "           ]" +
                "       ]" +
                "   }" +
                "}";

        Geometry g = new Gson().fromJson(json, Geometry.class);
        System.out.println(g);
        // Geometry [geometry=GeometryData [type=Polygon, coordinates={{{-69.899139,12.452005},{-69.895676,12.423015}}}]]
    }
}
class Geometry {
    GeometryData geometry;

    @Override
    public String toString() {
        return "Geometry [geometry=" + geometry + "]";
    }
}
class GeometryData {
    String type;
    double[][][] coordinates;

    @Override
    public String toString() {
        return "GeometryData [type=" + type + ", coordinates=" + ArrayUtils.toString(coordinates) + "]";
    }
}