The Showtime drama - which was recently nominated for three Screen Actors Guild awards - was officially picked up for another run in October.
Gansa told the Los Angeles Times that the show's writing team recently held a three-hour discussion regarding the premise of the third season.
He added: "I have to say that after the awards season last year, all of us felt this incredible pressure this year to live up to the promise of the first season. I think this [SAG] nomination tells us on some level that we succeeded [with season two]. It's gratifying."
However, the exec refused to reveal any plot developments from the in-development third run.
"Dana (Morgan Saylor) will get another pair of boots... I imagine the cork-board wall will return next season," he joked.
Damian Lewis recently confirmed that he has signed a seven-season contract with Homeland but insisted that his character Brody would still be killed off at any point.
The Homeland season two finale will air this Sunday on Showtime and a week later on Channel 4 in the UK.
> Game Change, Homeland lead Golden Globe TV nominations
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Watch Digital Spy's recent interview with Homeland star David Harewood below: