gistfile1.phtml

<?php if ( function_exists( 'bp_is_active' ) ) : ?>

    <?php if ( bp_is_active( 'activity' ) ) { ?>
        <div class="page-header-content generate-page-header generate-content-header">
            <div class="inside-page-header-container inside-content-header grid-container grid-parent">
                
                
                This is where you put what you want to show up in here (and delete this text).
                
                For example, an image:
                <img src="URL TO YOUR IMAGE" alt="" />
                
                Or just regular text and HTML - it's up to you.
                
                Just make sure not to touch any of the surrounding markup :)
                
                
            </div>
      </div>
    <?php } ?>
<?php endif; ?>