When you view GQueues on the web, there's plenty of space to leave your left hand panel open at all times. Because there's less horizontal real estate in the mobile app, your blocks, categories, and queues are collapsed.
To expand the side panel, click the icon at the upper left corner.
Once the side panel is open, you can choose to view Inbox, Assignments, Trash, or select blocks (My Queues, Team Queues, etc.) to view their categories and queues.