TeamSpeak 3 G-Key Plugin
This plugin provides support for Logitech devices with G-Keys for hotkeys. This allows you to use these macro keys directly without rebinding them to standard keyboard keys.
Download and install the latest version from myteamspeak.com.
Once installed G-Keys can be configured like any other hotkey, however by default these hotkeys can only be used when TeamSpeak 3 is in focus. To use these hotkeys with any application active you need to make TeamSpeak 3 the persistent profile in the Logitech Gaming Software.
More information on the addon page. Source code is available on GitHub.