No by taking Graduate Medical School Admissions Test you get admission bachelor program not in PG program at Australian universities and here I will get details of test.

Eligibility
GAMSAT is available to any person who has completed a Bachelor or an undergraduate honours degree, or who will be enrolled in their penultimate (second-last) or final year of study for a Bachelor or undergraduate honours degree, at the time of sitting the test.

The GAMSAT test is offered twice a year, in March and September. To sit GAMSAT a candidate must be a bona fide prospective applicant to a course for which GAMSAT is a prerequisite.

There is no limit to the number of times a bona fide candidate may sit GAMSAT

Candidates whose first degree is in a non-scientific field of study can still sit GAMSAT and succeed in an application for admission to one of the graduate-entry programs.

A science degree is not always a prerequisite and institutions encourage applications from candidates who have achieved academic excellence in the humanities and social sciences

Exam pattern
GAMSAT questions are based on material drawn from a variety of sources.

They typically require candidates to read and think about a passage of writing, to interpret graphical displays of information, to use mathematical relationships and to apply reasoning skills to tables of data.

GAMSAT is divided into three sections designed to assess performance in the areas of:

I Reasoning in Humanities and Social Sciences
II Written Communication
III Reasoning in Biological and Physical Sciences

Universities in Australia
Australian National University

Deakin University

Flinders University

Griffith University

The University of Queensland

The University of Melbourne

The University of Notre Dame (Fremantle)

The University of Notre Dame (Sydney)

The University of Sydney

The University of Western Australia

The University of Wollongong