Grades are converted to 4.0 scale with + or - grades not considered. Honors classes are weighted with additional .5 and AP/IB/AICE/DE are weighted with an additional 1.0.
But here is the interesting part, they only consider academic classes in the calculation. So typically if someone takes 4 years of band and gets all As it brings down their weighted GPA because it was not an honors or AP class. But not at UF, non academic classes don’t pull down your GPA so that is why the GPA may seem a little higher. My D’s is about a .125 higher using the UF method.