At a press briefing, she said the president and the opposition would not reconcile with fraudulent elections, Xinhua reported.
"I do not accept this election. It cannot be accepted," Zourabichvili said, calling on citizens to stage protest outside the Georgian parliament.
On Saturday, Georgia held its parliamentary elections under a fully proportional system for the first time. Almost 90 percent of voters cast their ballots via electronic devices installed at the polling stations.
The ruling Georgian Dream party has won the parliamentary elections, the Central Election Commission said late Saturday.