Opposition leaders also congratulated supporters, who gathered in a small square in front of the Public Television building briefly blocking traffic, on a deal with the government, which gave them more control in the main state-owned television channel.
"I congratulate you on a major victory," said Levan Gachechiladze, the united opposition's candidate in the snap presidential polls, who gained 26% of the vote, putting him in second place after Mikheil Saakashvili, who was reelected for a second term.
"You have forced the authorities to make concessions and invite the opposition to take part in running the television station," he said.
Members of the opposition are set to join the supervisory board of the Georgian Public Television.
The opposition also reiterated calls for a second election round, claiming the results were rigged. Opposition groups have also complained of violations during the vote and unequal campaign conditions, including lack of access to media and bias in the incumbent's favor.
Saakashvili was named the winner with 53% of the vote, enough not to hold a runoff.
Western observers admitted the election was imperfect, with Saakashvili exploiting his position during the campaign and cases of pressure and intimidation taking place, but said it met democratic standards in general and was the most competitive in Georgia's history.
Also on Tuesday, the opposition Labor Party lodged a lawsuit protesting against the election results.
"The final [election] protocol adopted by the Central Election Commission does not reflect realities," senior party member Kakha Dzaganiya told reporters. "The figures in it are flawed."
He said the party possessed video recordings and photographs showing police breaking into polling stations and opening ballot boxes. The Labor Party demanded a new vote count.
The party's press service said earlier on Tuesday that its leader, Shalva Natelashvili, who ran for the presidency, was hospitalized "on the verge of a heart attack" on Monday following pressure and "information terror" he suffered during the campaign.
Saakashvili called the snap elections following mass street protests in Tbilisi in early November fueled by popular discontent with his alleged totalitarian tendencies and the country's economic woes. He ordered a brutal police crackdown on protesters and briefly imposed state of emergency, triggering criticism from his Western allies.
The U.S.-educated president has sought to integrate the ex-Soviet state into Europe and to curb Russian influence on it ever since he came to power on the heels of the peaceful 'rose revolution" in 2003.
