The most up to date student roster will always be on the faculty's GGU4YOU area. This roster is especially helpful before the first day of the term.
You can send a class email from this roster page - Select all the students and then their emails will appear at the bottom of the roster page. You can copy and paste that list of emails into your preferred email.
You’ll also find a roster in your eLearning course, in the side area called “Participants.” Once the term begins, this list lags about 24 hours behind the GGU4YOU roster in terms of accuracy since the information between the two systems is synced once a day.