This can happen anywhere, to anyone. In North America rape is now being classed as an "act of terrorism" I believe-meant to subdue/dominate people. It doesn't necessarily have to have anything to do with how you dress etc (though I'm not saying it can't, either).
I'm so sorry you went through this. I would suggest talking to your campus counselor. Most campuses have someone in that capacity. They can really help you learn to live beyond this, and/or direct you to other resources. Also, I agree with continuing to live your life, but it doesn't hurt to be careful. Don't go places alone, down back alleys etc, after dark, for example. Stay on main streets/populated areas. If you have to go in unpopulated areas, consider going as a group and/or taking a cab. Does your campus have 'safewalk' or some such program (students that you can call to come walk you anywhere on campus after dark)?
I agree that unis tend to have very low tolerance to this. Fresher's week is no exception-unis get very bad reputations from acts like this. I would hope notices to other students are already going out, for their own safety, particularly since it occurred on campus. Since you made a statement, description of the offenders should also be going out. Criminal prosecution, especially if on CCTV, is definitely a possibility I'd think.
Don't let them scare you off-that is what they want. You're probably 'safer' on campus, with large numbers of students and staff. Don't let anyone make you think you deserve it. As already said, no means no. Talk to school counselors, victim's support, someone.
Good luck.