Posted this on the Rose Bowl forum too, but hope this can help others:
In the "Wires" group, and from 9am PT (for LA Rose Bowl), there were no GAs available. BUT just tried 3 minutes ago, and GAs showed up! It's been a frustrating process, but do keep patient. I know someone else yesterday who had the same experience, got 2 nosebleeds first, then got 2 GAs later in the day. Keep trying!
Fwiw I used a mobile Ticketmaster app to get them. They also show up now in my desktop browser. EDIT: As some recommended, use Incognito/Private Browsing mode to keep trying Ticketmaster.com on your desktop. As for the mobile app, it also allows you to keep trying over and over again without giving you the Sorry we couldn't process blah blah message.