No, Gai is not Lee's father. Rock Lee is actually an orphan whose parents were never revealed thorought the Naruto series. The reason why they look alike is simply because Lee choose to mimic Gai's style (i.e. the green clothes, bowl cut hair, etc.)
Might Guy, the Sublime Green Beast of Prey, has been a large part of the overall Naruto story since its early days. He is the leader of Team Guy, which also includes powerhouses Rock Lee, Neji Hyuga, and Tenten. He is mostly seen as the surrogate father of Rock Lee and the lifetime rival of Kakashi.
Have you ever wondered what would Guy sensei had a child? Well unknown to everyone in Konoha, with the exception of Guy and Kakashi, he has a single child.
Boba Fett Returns - The LoopeditMight DuyRankNinja RankPart II: GeninNinja Registration003001HideFamily Might Guy (Son)
Metal Lee is one of Boruto's friends and son of Rock Lee. He is voiced by Ryō Nishitani in the Japanese version, and Billy Kametz who also voices Hakuno Kishinami and Josuke Higashikata in the English version.
He died using the gate of death against the seven swordsmen of the mist, to protect Gai and his team.
Guy is the son of Might Duy, who was known throughout Konoha as the "Eternal Genin".
It is said that Tenten's eyes are similar to those of Metal Lee, which would indicate that she is his mother. In the series, Tenten and Rock Lee had a very good bond and she cared about Rock Lee alot. People assume that Tenten is the mother of Metal Lee as they both have similar traits in the series.
No, he doesn't get it back. But he retains all his jutsu and abilities, mainly because it is revealed that it wasn't Shukaku who protected Gaara, but his mother's will infused in the sand. However, after the Tailed Beasts are freed, Shukaku and Gaara become friends by the power of talking no jutsu and flashbacks.
MatsuriThe Couple. GaaMatsu (我愛マツ GaaMatsu) is the term used to refer to the romantic relationship between Gaara and Matsuri.