Microsoft just announced the final release of the security configuration baseline settings – for Windows 10 October 2018 Update (V1809) and also for Windows Server 2019.
I became aware of this topic about the following tweet from Michael Niehaus:
Security baseline (FINAL) for Windows 10 v1809 and Windows Server 2019 https://t.co/ioZM3NbNHM
— Michael Niehaus (@mniehaus) 21. November 2018
The announcement has been made within this Technet blog post, where you may find further details. The package may be downloaded here: Windows-10-1809-Security-Baseline-FINAL. This downloadable package includes importable GPOs, a PowerShell script for applying the GPOs to local policy, custom ADMX files for Group Policy settings, documentation in spreadsheet form and as a set of Policy Analyzer files. (Thanks to @PhantomofMobile for the hint)