Ah, this would be a pretty custom job I believe. It’s not something GP can do out of the box, and it doesn’t seem to be a feature of the plugin either.
You can try looking into it to see if the plugin has any PHP conditionals you can use in GP Hooks.
Maybe something like:
<?php if ( is_vendor() ) : ?> <?php echo $vendor->name; ?> <?php endif; ?>
Purely hypothetical – you’ll have to ask the plugin developers.