Kavelashvili, 53, who was the only candidate on the ballot, easily won the vote earlier in December.
Former soccer player Mikheil Kavelashvili was formally inaugurated as president of Georgia on Sunday, cementing the ruling party's grip in what the opposition calls a blow to the country's EU aspirations an d a victory for former imperial ruler Russia.
Outgoing pro-Western Georgian President Salome Zourabichvili said Sunday morning that she would vacate her residence at the Orbeliani Palace in Tbilisi, but insisted she was still the legitimate office holder.
"I will come out of here, come out to you and be with you. ... This presidential residence was a symbol as long as there was a president here who was legitimate. I bring legitimacy with me,” Zourabichvili told a crowd of supporters outside the palace.
She called Kavelashvili's inauguration a “parody."
Kavelashvili, 53, who was the only candidate on the ballot, easily won the vote earlier in December given the Georgian Dream party's control of a 300-seat electoral college that replaced direct presidential elections in 2017. It is made up of members of Parliament, municipal councils and regional legislatures.
In his speech Sunday, Kavelashvili promised to be “everyone's president, regardless of whether they like me or not.” He called for the nation to unite behind him around "shared values, the principles of mutual respect, and the future we should build together."
Georgian Dream retained control of Parliament in the South Caucasus nation in an October 26 election that the opposition alleges was rigged with Moscow's help. The party has vowed to continue pushing toward accession in the European Union but also wants to “reset” ties with Russia.
Georgia's outgoing president and main pro-Western parties have boycotted the post-election parliamentary sessions and demanded a rerun of the ballot.