You can access GALILEO from the library's webpage, just look for the link in the menu on the left side of the page.
On campus, this should send you directly to the GALILEO homepage. Off campus, you will be prompted to enter through the Open Athens portal. Select that you are a student, and then enter your student email and password.
Use this widget to search GALILEO; note at the top that you can switch between the "Bento" and "Classic" searches.