If you want the complete set of messages produced by pkg_add(1) during some prior execution, you are out of luck, unless you manually logged your console output with script(1) or a similar tool prior to running pkg_add.
However, any MESSAGE text files built into the binary packages, that display during install, are retained in the /var/db/pkg hierarchy, and are retrievable with pkg_info(1)'s -D option. If you run the command sequence I gave you, above, you will see the output of pkg_info -D for every installed package. You can page through it -- less(1) is a pager -- looking for anything you inadvertantly missed, or, that the meta-package didn't document.
Disclaimer: I don't know if the meta-package documentation is complete or not. The command sequence will query every installed package, looking for install messages, whether the package is a gnome dependency or not.
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