Hi, here is my explanation for your question. This is my findings, but I hope it helps.
Looks like you are trying to access GVM remotely. There are a few ways you could do that.
- Via SSH, you could issue commands to the
gvm-cli
orgvm-tools
- GSA is a web-application. You can configure it for access remotely system (From this post: External access to GSA web interface / IP - #5 by silentsteve)