I have IDP issued by RTO, Gujarat. I want to know if this is valid in the US. I heard that it can vary per state. I am in Florida, so does Florida state permit an IDP issued in India or not?
The IDP is only valid together with a regular driver's license. It might be necessary or not but it does not replace the original license. In Florida, it's actually not necessary to have an IDP anymore.
So the real question is wether your original license is recognized in the relevant jurisdiction. Apparently, all licenses from countries party to the 1949 Geneva Convention on Road Traffic (which India is) allow tourists to drive in the US. So you should be fine, at least if you are only visiting for a short time.