Theme Gmap Parameters

HI. I seem to be having issues with the GMap Theme function:

  // create array for gmap
  $map_array['id'] = $gmap_id;
  $map_array['width'] = ($node->field_gmap_width) ? $node->field_gmap_width : '100%';
  $map_array['height'] = ($node->field_gmap_height) ? $node->field_gmap_height : '300px';
  $map_array['latitude'] = ($node->location['latitude']) ? $node->location['latitude'] : '41.9023';
  $map_array['longitude'] = ($node->location['longitude']) ? $node->location['longitude'] : '-87.5391';
  $map_array['maptype'] = ($node->field_gmap_maptype) ? $node->field_gmap_maptype : 'Terrain';
  $map_array['controltype'] = ($node->field_gmap_controltype) ? $node->field_gmap_controltype : 'Large';
  $map_array['zoom'] = ($node->field_gmap_zoom) ? $node->field_gmap_zoom : '7';
  
  // create markers
  $marker = array(
    'text' => 'Hi', //phptemplate_gmapnodelabel_life_map($node, $opt),
    'longitude' => ($node->location['latitude']) ? $node->location['latitude'] : '41.9023',
    'latitude' => ($node->location['longitude']) ? $node->location['longitude'] : '-87.5391',
    //'markername' => ($node->field_gmap_markername) ? $node->field_gmap_markername : 'Green',
  );
  $map_array['markers'][] = $marker;

  return theme('gmap', $map_array);

This is how API.txt describes how to do this. But looking into the code a little I add the following and get the correct map settings but no markers:

  $map_full['#settings'] = $map_array;
  return theme('gmap', $map_full);