LG AS740 - Manual (Page 108)

107 Gmail TM
To switch accounts
Gmail displays conversations and messages from one Google Account at
a time. If you have more than one account, you can open the Accounts
screen to view how many unread messages you have in each account
and to switch accounts.
1 From your Inbox, press the Menu Key and touch Accounts.
2 Touch the account that contains the email you want to read.