OK I’ve found a bit more:
Firstly the Citizens for Good Public Policy have their site here, which describes what the proposed amendment will do, and links to a copy of the draft amendment. They intention is stated as follows:
The proposed amendment, if approved by the voters of Gainesville, will require the city’s civil rights categories (contained in the Code of Ordinances) to match the State of Florida’s civil rights categories. This action will remove two current categories—sexual orientation and gender identity disorder—as well as nullify current laws, such as the Gender Identity Ordinance, that specifically pertain to these categories.
That’s a particularly evil (and I use the word advisedly) ordinance as it completely removes all legal protections from anybody who is gay or trangendered.
There’s also a decent Associated Press article which summarises the state of play and includes a little map to show where Gainesville lies in Florida.