It’s easy if you use the right tool.

1. Draw circle in Inkscape
2. Export as bitmap
3. Import bitmap in GIMP.

I’ve never had good luck with NFS on a high latency connection. SSHFS still works fine even if the server is on the other side of the planet.

SSHFS is secure and works well over the internet. If you only want to access it over the LAN, then NFS is a much better option.