ks in glyph sequence so that they precede (within the sequence) the base
 character to which they are applied. N.B. In the case of LTR segments, marks are not reordered by this,
 method since when the segment is reversed by BIDI processing, marks are automatically reordered to precede
 their base glyph.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>gs</CODE> - an input glyph sequence<DD><CODE>gpa</CODE> - associated glyph position adjustments (also reordered)<DD><CODE>script</CODE> - a script identifier<DD><