The read-me with the 1.2.4 version said that the module was donated by Patrick Kellum. Is he the author of punbb?
I know that one of the apparent changes that was made is that the phpGedView version takes the gedview logon as the logon for punbb, so there is no separate logon - a very nice feature. I don't know what other under-the-cover changes were made. I did try running the 1.2.10 version out of the box hooked up to phpGedView and it bombed. So modifications will be required. I'm just not that skilled at php to know what those changes need to be.