How to find a mount point of a samba share mounted by 'gio mount' command?

The other day, I have mounted a samba share using this command.

gio mount smb://129.254.xx.yy/mygroup

Today, I've forgotten this and tried to mount the share with the same command, and got this message.

gio: smb://129.254.xx.yy/mygroup/: Location is already mounted

Usually, it was mounted on /run/user/1000/gvfs/ but nothing is found there(my user id is 1000).
How can I find this mount location?