My daughter is very interested in GT as well. Yes, it’s one of the last dinosaurs to require/strongly recommend 3 subject tests. Daughter got a 770 in lit, but a 630 or so on US History. She got an A+ in the class, and a 5 on her AP exam. She felt test was just knowing random facts about US History, and was generally not representative of the in-class work. She will considrr retaking it. She’s not sure what 3rd test she could take. She got a 29 on her math ACT, and 36s in English and grammar. 34 in science. She will not be an engineering/math/science based major, so there isn’t much of an option for that 3rd test. She could take Spanish, but knows that native speakers will set the curve. Good luck to you.