How to override read.php in theme?

Hi, there is no override for the template.

What exactly do you want to do?

Thanks for your reply.

I want to group span has class date-time, gb-author-origin, gb-time into one “DIV” element.

You mean without the Name part?
Because the div.gb-author-info has those element, but also includes the Name.

You could use a filter and a regex.
This worked for me. You might finetune it.
You can place it in your functions.php or in a custom plugin.

function your_custom_function($entry) {
    // $entry is a string
    $old = '<span class="gb-author-origin">';
    $new = '<div class="yourdiv"><span class="gb-author-origin">';

    if ( strpos( $entry, $old) ) {
        $entry = str_replace( $old, $new, $entry );
    } else {
        $old = '<span class="gb-datetime">';
        $new = '<div class="yourdiv"><span class="gb-datetime">';
        $entry = str_replace( $old, $new, $entry );
    }
    $old = '<div class="gb-entry-content">';
    $new = '</div><div class="gb-entry-content">';
    $entry = str_replace( $old, $new, $entry );
    return $entry;
}
add_filter( 'gwolle_gb_entry_read', 'your_custom_function');

Marcel Pol,
Thank you so much!