I have been watching naruto for a while but I still do not know what type of jutsu the 8 gates will be. Im guessing it will be a combination jutsu. But when will might guy use it? Im guessing kakashi would have to be near death or maybe lee. But other than that, he wouldn't have a reason to use it. But as the story goes along it seems as if the 8 gates would be meaningless at the expence of guy.s life... Thoughts
The 8th gate is The Gate of Death located at the heart. Releasing this gate uses up all of the body's energy. It makes the heart pump at maximum power and exceeds the power of every other gate. Opening this gate gives the user power that is even beyond the five Kages, but comes at the expense of the user's life shortly after.
The 7th gate is "The Gate of Shock", located below the stomach. Further increases the user's speed and power. Allows the user to perform the Daytime Tiger. Those who open this gate will pour glowing green sweat from every inch of their body, blue in the anime, which immediately evaporates from their own heat energy, creating an aura which people would mistake as a chakra coating. Unfortunately, the side effects of opening the gate are that the user's muscle fibers are ripped to shreds, causing intense pain if anything or anyone touches them.
Kinjutsu I believe as said earlier it's not taijutsu because that's just using your body as a weapon the eight gates is something totally different from that.