Super-simple script to populate geofield data from addresses

gistfile1.txt

$addresses = array('1600 Pennsylvania Ave., Washington, DC'); // 

foreach ($addresses as $key => $address) {
  $geocoded_location = geocoder('google', $address); // Returns a geoPHP geometry object, likely a point.
  $node->field_geofield[LANGUAGE_NONE][$key] = geofield_compute_values($geocoded_location->out('wkt'));
}

//Node save as usual