Thanks, yes it is related, I was able to install the system by putting "nomodeset" in grub.

[Attachment 1]

With this problem: https://issues.guix.gnu.org/43985

Which is probably related to GDM or graphics, I was able to log in with the root user. I then updated the system with the "guix pull" and "guix system reconfigure /etc/config.scm" commands. To apply the updates, I rebooted the system and then I now have this problem:

[Attachment 2]

[Attachment 3]

My graphics card: NVIDIA GT720