Mr Bainimarama and former Fiji police commissioner Sitiveni Qiliho were released in Suva on Friday after pleading not guilty to one charge each of abuse of office.
Speaking outside court after being released, Mr Bainimarama said he "served with integrity" as prime minister, with "the best interests" of all Fijians at heart.
"I've been served this charge. This charge against my legacy," he said, after shaking hands with supporters outside court.
"So I am going to fight this charge not only for my reputation but for democracy for all Fijians, and of course for our constitution."
Four MPs from Mr Bainimarama's political party, Fiji First, provided bond for the former prime minister.
The two have also surrendered their travel documents, which included a diplomatic passport for Mr Bainimarama.
- Mr Bainimarama and former police commissioner Sitiveni Qiliho are accused of interfering with an investigation into the University of the South Pacific
- The former prime minister spent Thursday night in custody and on Friday pleaded not guilty to the charges
- Both men were granted bail in court in Suva on Friday
Story first published by: ABC News