Maester Aemon is the show's first character to die on-screen from natural causes. The only other characters known to have died from natural causes are Hoster Tully, who only appeared on-screen as a corpse at his funeral in Walk of Punishment (2013), and Old Nan, the Stark servant who is considered deceased by the show's writing canon after the death of the Margaret John who played her, though her death was never mentioned on-screen. Peter Vaughan, who portrayed Maester Aemon, would pass away himself on December 6th, 2016, almost a year and a half after the airing of his final appearance on the show.
Tyrion is the only character in the entire series that has spoken to both Aemon and Daenerys, until season 7.
Tyene describes Bronn as having a very good voice. In the mid 1990s, Jerome Flynn had a singing career as one half of Robson and Jerome with fellow actor Robson Green. The pair had several UK chart number ones, most notably with a cover version of Unchained Melody which was number one for 7 weeks.
The title of this episode is a reference to Tyrion, who is "the gift" from Jorah to help him regain favor from Daenerys. It has several possible alternate meanings as almost every parallel storyline involves a character giving or receiving an important "gift" of some kind: Sam gifts Jon with dragonglass weapons for his journey to Hardhome, Melisandre informs Stannis that the Lord of Light will require a sacrifice to ensure their victory in Winterfell, and Littlefinger offers the "gift" of a witness to Olenna Tyrell to incriminate Cersei.
With this episode, Tyrion has officially surpassed his storyline in George R.R. Martin's novels, as he and Daenerys had not yet met in the volumes published at the time, although Martin has stated the two characters will "intersect" in a future novel. Showrunners David Benioff and D.B. Weiss said their decision to advance this moment instead of postponing it to the next season "creatively [..] made sense to us, because we wanted it to happen. They're the two best characters of the show. To have them come so close together this season, [and] then have them not meet felt incredibly frustrating. Also, we're on a relatively fast pace. We don't want to do a ten-year adaptation of the books. We don't want to do a nine-year adaptation. We're not going to spend four seasons in Meereen. It's time for these two to get together. It's hard to come up with a more eloquent explanation, but this just felt right. [Varys] puts Tyrion's mission out there [in the season premiere] and the mission ends in Meereen." Benioff and Weiss have also frequently stated that they were adapting the series as a whole, not neatly matching up each book with a season, which is why they sometimes moved scenes from the books around in the show's timeline when they felt it was in the best interest of the series.