GSE Systems Comments on Unusual Trading Activity

Sykesville, MD – January 22, 2013 – GSE Systems, Inc. (“GSE” or “the Company”) (NYSE MKT: GVP) announced that the New York Stock Exchange has notified the Company about significant and unusual trading activity in GSE’s shares on January 22, 2013 and requested the Company to respond by press release to the unusual activity. Ordinarily, it is GSE’s policy not to comment on unusual market activity or market rumors; however the Company did confirm that it is not aware of any material corporate developments beyond its most recently issued news releases which could account for the recent unusual trading activity in its shares.