Write custom metadata
groups_update_groupmeta($GroupId, 'MyValueName', $MyValue);Read custom metadata
$MyValue = groups_get_groupmeta($GroupId, 'MyValueName');
if ($MyValue == "") //Will be "" if not stored
$MyValue = "abc";Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.