These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.04 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/gobject-introspection-common-1.86.0::gentoo  1058 KiB
[ebuild  N     ] gnome-extra/libgsf-1.14.56:0/114::gentoo  USE="bzip2 -gtk -introspection -test" 697 KiB

Total: 2 packages (2 new), Size of downloads: 1754 KiB