The Function ST_AsGeoJSON gives you the possibility to generate a JSON text from the point geometry.
Use ST_AsGML function to export to GML the point geometry on your table.
With ST_AsKML you can export to Google Earth format the geometries on your geotable.
Finally, using ST_AsText, you can export the geometry to WKT as it can be viewed below.
Published on Jan 8, 2012