When incumbent
State Representative Suzanne Jacobs was unable to seek another term in 2000 due to term limits, Gannon ran to succeed her. In the
Democratic primary, Gannon faced former State Representative
Barry Silver, David Niven, Michele Nemo, and Doug Westcott. Gannon initially placed second in the initial primary, receiving 26% of the vote to Silver's 37%. However, because no candidate received a majority, a runoff election was held between Silver and Gannon. She ultimately emerged victorious, winning 52% of the vote to Silver's 48%. In the general election, she faced only
independent candidate Stan Smilan, whom she defeated in a landslide with 85% of the vote. When she ran for re-election in 2002, Silver ran against her once again, and because no other candidates filed, the primary was open to all voters. Silver sued Gannon "for allegedly defaming his character in campaign literature she distributed" two years prior, while Gannon responded by sending out campaign literature "pointing out Silver's poor driving record" and calling him a "negative person." Gannon did not much face difficulty in winning renomination, which she did with 63% of the vote. She was re-elected without opposition in 2004. ==Palm Beach County Tax Collector==