Can Guy Open All 8 Gates?

Despite the handicap, Kakashi Hiden, Konoha Shinden, and the Boruto anime all show Guy continuing his life as a ninja as best as he can. In Naruto Shippūden the Movie: Bonds, Shinnō claims that his Body Revival Technique, combined with Dark Chakra, allows him to open all eight gates without any drawbacks.

Can Guy use the 8 Gates again?

Although Guy can no longer tap into the true power of the Eight Inner Gates, he's certainly strong enough to open one gate, at least. The First Gate, also known as the Gate of Opening, removes the mental limiters of the user. Kakashi Hatake has been seen making use of this gate during his cliff climbing practice.

What happens if you open all eight gates?

Each additional gate grants the user new levels of strength with additional injuries; by opening all eight gates the user will become invincible in battle, but their body will be so damaged in the process that they will die afterwards.