I missed it by one day…
GVM 20.08 was released [GVM 20.08 (stable, initial release 2020-08-12)] and today I updated my little writeup from GVM 11 to 20.08 if someone want to try out the source installation on Debian 10.
This is just some help if you want to test out the great work that Greenbone have done with GVM.
And if you find any problems, fact error or have a suggestion, just leave a comment
And the link is https://sadsloth.net/post/install-gvm-20_08-src-on-debian/