Our list contains schools have been accredited in software engineering by ABET, the official organization in the US that accredits applied science, computing, engineering, and technology programs. Georgia Tech's lack of appearance on the list does indeed mean that its software engineering program hasn't been accredited by ABET. Georgia Tech's computer science program is accredited.
You can see a list of all accredited programs in software engineering, computer science, and other disciplines at http://www.abet.org/schoolareaeac.asp.