You would have to make a Group
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How do I create a Contact Group?
Gmail lets you organize your contacts into Groups so you can easily send messages to a number of people at once. Here's how to create Contact Groups:
1. Log in to your Gmail account.
2. Click Contacts along the left side of any Gmail page.
3. Open the Groups tab, and click Create Group.
4. Enter your contact group's name in the Group name: field.
5. Type the contacts you'd like to include in the Group in the Add contacts: field. (Gmail's auto-complete feature will suggest addresses from your Contacts list as you type.)
6. Click Create Group.
If you'd like to choose contacts from a list when creating Contact Groups, you can do so from the Frequently Mailed and All Contacts tabs. Here's how:
1. Click Contacts along the left side of any Gmail page.
2. Open the Frequently Mailed or All Contactstab, and check the boxes next to the names of each contact you'd like to include in your new Contact Group.
3. From the Add contact to... drop-down menu, select New group....
4. Enter the name of your new Contact Group in the appropriate field, and click OK.
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You will still have to manually enter the Name of the Group to do the forwarding .... Gmail Cannot Auto Forward (but you might be able to in Outlook)
How do I send mail to a Contact Group?
Contact Groups make it easy to send one message to lots of people. Here's how to address a message to a Contact Group once you've created it:
1. Log in to your Gmail account.
2. Click Compose.
3. In the To: field, enter the first few letters of the name of the Contact Group to which you'd like to send the message.
4. Select your Contact Group for the list of addresses Gmail's auto-complete feature suggests.
5. Compose your mail!
You can also compose messages to a Contact Group from within the Groups tab. Here's how:
1. Click Contacts along the left side of any Gmail page.
2. Open the Groups tab, and check the box next to the name of the Group to which you'd like to send a message.
3. Click Compose along the top of the page.
4. Compose your mail!