Hi,

You need to install child theme, copy woocommerce.php template from parent TheGem theme to child and in this template in child after code:

    $thegem_sidebar_stiky = $thegem_item_data['sidebar_sticky'] ? 1 : 0;
    $thegem_sidebar_position = thegem_check_array_value(array('', 'left', 'right'), $thegem_item_data['sidebar_position'], '');

add next:

    if(is_product()) {
        $thegem_sidebar_position = 'left';
    }