Example of modal answers broken down to give you the best possible sense of what is required when going into the exam. The user of vocabulary and semantics; Sample essays along with the rubrics, prompts and tips making essay writing easy for even the most amateur writer; The above points are only scratching the surface.
Focus on the ESSAYS. Although obviously very subjective it is easy to see the right buttons to push. I simply read AC Grayling who might as well have been writing essays intended for the GAMSAT and he covers all the topics. Plus being aware of what is going on politically helps to give examples. You can also learn generic quotes which can work.