OK. I got it working. I created two icon definitions:
icon_0 & icon_1
Then depending upon a value in the recordset I set my "icon" value to one or the other.
icon = <?php echo $foo=(($row_Google_recordset['private'] == 1) ? icon_0 : icon_1) ?>;
var marker_0_<?php echo $Google_recordset_id; ?> = new GMarker(point, icon);
.
.
.
wagmp_map_1_obj.icons.push(icon);