In your G2G Feed you get the report of activity related to your followed tags. If you want to get the list of questions tagged with one of them you can click on that tag and you will get the list.
But, how to get the list of questions tagged with any other tag?
You can get it doing in G2G exactly as you do to go to the page of a known WikiTree ID profile in WikiTree: By replacing the last part of the URL.
Examples:
Questions tagged "quebecois":
https://www.wikitree.com/g2g/tag/quebecois
Questions tagged "humor":
https://www.wikitree.com/g2g/tag/humor
Questions tagged "photo" instead of "photos":
https://www.wikitree.com/g2g/tag/photo
If you look for a not yet added tag you'll get:
Recent questions tagged [Looked up tag]
No questions found.
I hope it could be useful for others.