I could be wrong but it's not so much that you need "GFPT" endorsed in your log book or SPL, rather that you have the pre-requisite hours in the various stages of the day VFR syllabus. A GFPT is just something that gives you passenger carrying privileges on a SPL. Your current training school CFI is the one with the responsibility to make sure all your training hours are correct before putting you up for flight test.