The Power Geez doesn't appear to be available anywhere on the web, therefore compatibility with Office 2016 is questionable because of the lack of information about installation and operating systems support.
For example, Office 2016 supports Windows 10, Windows 8.1, Windows 8, or Windows 7 Service Pack 1, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, or Windows Server 2008 R2. The Power Geez should all those operating systems as well to be able to run it properly.
Here is a website containing apps that are alternative to Power Geez.
