Once you
download GAIM
, you'll need to configure your client to connect to the Google Talk service. Here's how:
Open GAIM.
Click 'Accounts' at the bottom of the login page.

Click 'Add' after the 'Accounts' window opens.

Enter the following information in the 'Add Account' window:
Protocol: Jabber
Screen Name: enter your full Gmail username (everything before
[url=mailto:'@gmail.com']'@gmail.com'[/url]
)
Server: gmail.com
Password: we suggest leaving this field blank for increased security, but if you'd like to log in automatically, enter your Gmail password
Alias: leave this field blank
Remember password: check the box if you'd like GAIM to remember your password (you won't be prompted to enter it each time you log in, if you select this option)
Auto-login: check the box if you'd like to connect to the Google Talk service each time you use GAIM

Click the '+' next to 'Show more options.'
Enter the following information in the section that appears:
Jabber Options: Check the box next to 'Use TLS if available,' and leave the other boxes unchecked.
Port: 5222
Connect server: talk.google.com
Proxy type: Use Global Proxy Settings

Click 'Save.'