Today Gammu 1.38.0 has been released. Changes in last two testing releases have been stabilized and this is the outcome. You can expect changes in API or SMSD tables as well as some additional features.
Also this is first stable release after several years which comes with Windows binaries. These are built using AppVeyor and will help bring Windows users back to latest versions.
Full list of changes and new features can be found on Gammu 1.38.0 release page.