Exhibit 23 We consent to the incorporation by reference in Registration Statement No. 33-55832 on Form S-8 dated December 16, 1992, of our report dated February 7, 2002, on the consolidated financial statements and schedules included in the Annual Report on Form 10-K of GREAT SOUTHERN BANCORP, INC. for the year ended December 31, 2001. /s/ BKD, LLP March 27, 2002 Springfield, Missouri