Sorry for the bad news - but DLCs for removed games won't work: "Missing Base Game" will always be the result, because Steamgift cannot see removed games! But thank you for trying ;-)

Hello, I've created a new group for NGG because the previous one was created by a person who no longer uses Steam and SG, so I'm very limited in the administration of the group. We'll just use the old group as an archive. Please join the new one: https://steamcommunity.com/groups/NGGSG

Thanks, let me know if you have any questions.