I wrote a gentoo install script with the fancy name "gains", which stands for Gentoo Automated INStaller.
I needed to install gentoo quickly on 5 identical laptop, and I could not find an automated script that fulfilled the requirement of being able to install on top of LUKS+LVM.
I recently added support for complete disk encryption with encrypted BOOT partition opened by a password prompt and ROOT opened by a keyfile found inside initrd.
Besides a basic installation, you can also have a complete GUI environment using mate-desktop.
You are invited to give it a spin in a virtual machine or real hardware...
https://gitlab.com/oz123/gains

