Great Southern Bank — Banking Services, Mortgage and Auto Loans. Great Southern’s mission is to build winning relationships with its customers, associates, shareholders and communities. On any given day, we are hard at work helping young families realize the dream of home ownership, helping a business owner expand his or her business, or providing the right product or service to help an individual save for a future goal.. business loans, loans, a health savings account, business to business loans, business loan, loan, business, home with loan, health savings account, credit, line of credit, line of credit on home, online banking, internet banking, mobile banking, ITM, PTM, text banking, checking, checking account, savings, savings account, CD, IRA, Great Southern Bank, Great Southern, Bank