Sorry about that, I used date() instead of vbdate(). I'll fix it in the next version. If you want to fix it yourself, open up includes/functions_gsbos.php and look for a line like this:
Code:
$time = date($vbulletin->options['gsbos_date_format'], $timestamp)
and replace it with
Code:
$time = vbdate($vbulletin->options['gsbos_date_format'], $timestamp);
Alternatively, wait for the next version and it'll be fixed then