Konrad,
I followed the steps of creating a new position in templateDetails.xml and added the template position in the gk.const.php.
Then I've added your code into the default.php.
templateDetails.xml
<positions>
<!-- Template specific Module Positions -->
<position>breadcrumb</position>
<position>bannertop</position>
<position>social</position>
<position>login</position>
<position>footer_nav</position>
<position>search</position>
<position>logotop</position>
<!-- STANDARD Module Positions -->
<position>sidebar</position>
<position>inset</position>
<position>mainbody</position>
gk.const.php
$GK_TEMPLATE_MODULE_STYLES = array(
'breadcrumb' => 'none',
'login' => 'none',
'lang' => 'none',
'search' => 'none',
'footer_nav' => 'none',
'logotop' => 'none',
That's what I've done