basic outline of gamsat: divided into three parts--science, writing, and verbal reasoning. the science section is subdivided into one part physics, one part chemistry, and two parts biology. it's scored as 2(science) + writing + physics.
my recipe for "success" on the gamsat... (i.e., my score wouldn't knock anyone's socks off but it did get me in) as follows.
i got the practice exams with the answers in the back that they send you when you register for the exam. i set one aside, left it closed, and went through the other one without time limits and with unlimited access to calculators, textbooks, etc. everything i could do with little problem i practiced it over and over and wrote out my justification for the answers i gave, then checked them against the answers in the back. if it was wrong, i marked down the concepts at hand and hit the texts. any questions i didn't know out of my head, had trouble with, or simply was completely clueless about (most especially, "ball's ratio of momentum to potential energy is changing how at point b... errr...") i also marked down. then, i took this list of all the concepts i didn't know, found several relevant chapters in textbooks at the library about each, and went through the chapters one by one, doing every practice problem & conceptual doodad they gave along the way. it was a lot of work--it took a few days go go through the test first, and then about 2-3 afternoons a week in the library, but i wound up with about a classwork-load full of notes and practice material i could use. not Kaplan test prep quality, but it sufficed.
then i went thorough this a million times and forced myself to name as many molecules ad nauseam as i possibly could, and taught it to a hapless environmental science undergrad who was stuck in biochemistry and needed help.
and then i took out the second test and went through it timed, and checked my score, and then did the same thing with it and picked it apart, only it took a lot less time the second time.
it was a fair bit of work, but it worked, and it could be done around my regular undergrad classes... dunno, sorry so long and rambling, hope this helps!
