Hello, Developer. I was intreged by the OS and decided to try it. I noticed that the GPG sig was bad and thought I should let you know. (or perhaps I did something wrong, let me know.)
Terminal: seb@seb-pc ~/Downloads> gpg --verify guixsd-install-0.16.0.x86_64-li gpg: no signed data gpg: can't hash datafile: No data seb@seb-pc ~/Downloads> gpg --verify guixsd-install-0.16.0.x86_64-li0.x86_64-linux.iso gpg: Signature made Thu 06 Dec 2018 09:32:25 AM MST gpg: using RSA key 3CE464558A84FDC69DB40CFB090B11993D gpg: Can't check signature: No public key seb@seb-pc ~/Downloads> gpg --keyserver pool.sks-keyservers.net \ --recv-keys 3CE464558A84FDC69DB40CFB09 gpg: key 090B11993D9AEBB5: 124 signatures not checked due to missing gpg: key 090B11993D9AEBB5: public key "Ludovic Courtès <l...@gnu.org gpg: no ultimately trusted keys found gpg: Total number processed: 1 gpg: imported: 1 seb@seb-pc ~/Downloads> gpg --verify guixsd-install-0.16.0.x86_64-li0.x86_64-linux.iso gpg: Signature made Thu 06 Dec 2018 09:32:25 AM MST gpg: using RSA key 3CE464558A84FDC69DB40CFB090B11993D gpg: BAD signature from "Ludovic Courtès <l...@gnu.org>" [unknown]