This module is used to configure the Gnu Privacy Guard service aka GPG, or GnuPG.
GPG (Gnu Privacy Guard) allows you to encrypt and sign your data and communications; it features a versatile key management system, along with access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications.
This is what the options look like you can add to your machine-settings:
{
machine-settings.system.modules.gpg = {
enable = boolean;
};
}
Look at the NixOS options for more information about how to configure GnuPG.