This is probably a stupid question but I have no idea how to write a good essay (well 2 essays technically) for the gat! I did the gat last year with no preparation at all and uh.. needless to say the writing section was really bad.. :/ Can anyone post one of their practice ones up? Or is there a place with sample gat essays already? Thanks heaps guys! (I know this is really really late... :/ )
The first essay is just testing your ability to rearrange, organise and connect pieces of information together. During reading time, identify three major subtopics within the major topic (for your three body paragraphs) and essentially regurgitate the information provided correctly and in a manner that makes logical sense. This task isn't too difficult, but some people do silly things like state where on the page the information is from, or if the information was provided on a graph or something. Don't show off and do anything too fancy here, unless the topic really lends itself to something other than an essay (for example, a few people took on the persona of David Attenborough for the wolves task). Also, this is just to assess your ability to present information in a user-friendly manner, so remain objective throughout your piece.
The second essay is much harder in my opinion. You are provided with four stimulus statements and you have to write a piece of prose presenting your point of view, basing your argument on the provided prompts. In the three times I have now sat a GAT paper (two trials and the official GAT last year), I have adopted a diary entry style simply because I have essentially no real evidence to back up any arguments I may make in a conventional essay. To be honest, more often than not, I've had to force myself to have some sort of opinion on the provided topic. I must add that you do not need to directly respond to each statement or focus solely on one statement. They are provided as a basis for you to start your writing, much like a context response in English.
I recently did the 2011 paper as a trial and the persuasive response required me to write about fashion and beauty. This was not something I could identify with at all.

In the end I adopted the persona of a teenage girl who was being bullied because she didn't wear the latest fashion trends and wrote a diary entry about a particular experience of being bullied (and giving into the bullies) and how I felt the way society was moving. I got a 9/10 for this by an external examiner so it's a style that I have stuck with.
Also, your responses do not need to be long! One teacher was shocked that I wrote three pages for each response given the fact that we are only supposed to spend 30 minutes on each task. I have heard anecdotally that one and a half to two pages should suffice.