Greetings, Werner, nice to hear from you.

I've been reading about this (.gvfs) some.

It turns out, as you say, that .gvfs is a mount point put there by some program,
possibly LibreOffice, which I use. In my case the .gvfs, as a file, never has any contents;
it does show up as in an mtab entry related to fuse.

One post I read suggests unmount and delete and see what happens.
The notion being is that if some program needs to mount something it will re-
establish the mount point. I'm trying this route at present.

FWIW, Ubuntu and others are re-routing this mount point to what we would call /run/knoppix/.gvfs,
all with no more explanation than for the earlier home directory location.
Users have been perplexed by .gvfs for as far back as 2008 I've noticed.