The description of the "gnome" package is: Full GNOME Desktop Environment, with extra components
Unless we are talking about installing "gnome" on top of a NetInstall, it is probably not the wanted package. Indeed, that would mean two programs for most tasks: the GNOME program and the program that came with the original installation of Trisquel (or Trisquel Mini).
See https://trisquel.info/en/wiki/installing-gnome-shell
