Is there a test Gradebook environment I can work with so I can see what a faculty member might see?

There is not a test environment currently. There is a link to sample screens similar to what faculty see available on the MyUCLA portal page, my.ucla.edu, just below the login button. The direct link to the samples is my.ucla.edu/samples.
Questions about this feature can be directed to the Undergraduate Education Information Technology Help Desk at 310-206-4525.