We regret to confirm that Robokiller doesn't currently support Google Voice voicemail.  However, if you're using AT&T or T-Mobile, you're welcome to keep using the service offered by your carrier. 

If you're with a carrier other than AT&T or T-Mobile, don't worry! You can rely on Robokiller to manage your voicemails efficiently through our hosted option.

To learn more about the topic, kindly refer to this dedicated article.