0000950123-09-046205 424B5 1 20090925 20090925 GHL Acquisition Corp. 0001418819 3669 000000000 DE 1231 424B5 33 333-159673 091088335 C/O GREENHILL & CO. 300 PARK AVENUE NEW YORK NY 10022 212-389-1500 C/O GREENHILL & CO. 300 PARK AVENUE NEW YORK NY 10022 424B5 1 y02178be424b5.htm 424B5