Package: x2goserver
Version: 4.1.0.3

I follow this guide always to install x2go :
https://wiki.x2go.org/doku.php/wiki:repositories:debian
the guide says to use this command:
$ apt-key adv --recv-keys --keyserver keys.gnupg.net E1F958385BFE2B6E

but http://gnupg.net  is down and seems to have a serious problem, you can
see here
SKS Keyserver Network Under Attack
https://gist.github.com/rjhansen/67ab921ffb4084c865b3618d6955275f

is there another way to install x2goserver without gnupg?
thanks