Hi amarjit
I think you can achieve that by adding a new module position under the header block of template to show that slideshow. Try with my tweak below:
1 - Create a new position in the file: /templates/gk_issues/templateDetails.xml , I call it 'top1' position
2 - Now go to layout file and load this new position block: /templates/gk_issues/layouts/default.php by adding this snippet of code:
<?php if($this->API->modules('top1') && $item_id != $error_item_id && !GK_COM_USERS) : ?>
<div id="gkTop1" class="<?php echo $this->API->gkModuleBlockClasses('top1'); ?>">
<jdoc:include type="modules" name="top1" style="gk_style" />
</div>
<?php endif; ?>
right after the header block:
3 - Finally, go to backend settings of ImageShowGK4 module, assign it to this new position 'top1'.
Hope this helps.