Call the Pasco county school board and ask them what test they use.
There is no way to study for an IQ test, but you can prepare her by letting her know what the layout may be like and what she will be asked to do.
Over here in Polk County we use the RIAS IQ test. It is nice because it is short.
Once you find out which test they use, you can go to http://www.hoagiesgifted.org/tests.htm and get more information about the actual test.
In Polk County you must have an IQ of 130, or 120 if you are low income or minority, to get into the ESE gifted program and be covered under Florida's ESE laws.
Some schools in my district will also allow high achieveing kids to go into the gifted program, but they are not considered ESE for legal purposes.
Please keep us posted, and be prepared.. Waiting on the school board to go all they way through the testing process, can take months.
Welcome and glad to hear of another Floridian