This is a quick fix for any installations running PHP 5.2.
This was a fatal error on those old PHP versions.
If you were affected by this error, see here for instructions on fixing it.
According to WordPress.org, 7% of WordPress installations are running on 5.2 still. GP 1.3.32 was live for a couple hours on a Sunday, so hopefully this means there was only a tiny fraction of people affected.
If you’re running PHP 5.2, you should contact your hosting ASAP and ask them to update you to the latest stable version. 5.2 is very old and unsupported, so it’s very vulnerable to hacking and other issues.
If you’re upgrading from a version prior to 1.3.32, check out the changes here.