I've found a Gintama English dub too bad it starts at season 3 I'm optimistic but wont get my hopes to high. Curious to here your thoughts and opinions.
http://www.crunchyroll.com/anime-news/2017/02/01/crunchyroll-adds-english-dub-of-gintama-season-3
http://www.crunchyroll.com/anime-news/2017/02/01/crunchyroll-adds-english-dub-of-gintama-season-3