Can i write non-English char's to image by GD ?
Yes, you can. Take a look at http://www.php.net/imagettftext
sure you can, as long as those international characters are in your TTF-font.
I made a complete script to generate nice graphic headlines with whichever TrueType-font you want, including shadow and all - take a look at http://www.thejonassons.com/mans/textimage/
It's in Swedish, but the link on top lets you download the PHP.
Function require FREE TYPE lib