I'm not sure exactly what you're trying to accomplish.
If you want people who visit PAGE.com to be redirected to a page you created on globalivity.com, you'd need to setup a redirection on PAGE.com either in the .htaccess or through your host.
If you're trying to have a menu link on your globalivity.com page that links to PAGE.com then you'd setup a menu link via Appearance-->Menus under the Links section. In this case the content would be hosted at PAGE.com.
If you need the content hosted on globalivity.com, you'd want to do the first option. You could also have the domain masked so that even though it forwards to globalivity.com/PAGE the url still shows PAGE.com. You'll need to check with your host on how to do that.
Hope that makes sense.