This year’s 16th issue of Shueisha’s Weekly Shonen Jump magazine has revealed that the currently-running Gintama. anime will end in March 2018, but will return in July 2018, going into the “climax” of the “Shirogane no Tamashii” (Silver Soul) arc. Episode 353, the last episode before the show enters its hiatus, will air on March 25, 2018.
The anime entered the “Silver Soul” arc on January 7, 2018. “Silver Soul” is the manga’s final arc that began in July 2016.
The current anime premiered in October 2017, and began with the “Porori Arc” story. Crunchyroll is simulcasting the series as it airs in Japan.