No way man i mean have you seen the fifth gate in the naruto episode power#4 or was it #3 well you know what i mean was he fast or what they say that the gates that gai and lee have are greater and powerfull and faster than any kage so the raikage is no match with the gates any questions.
IMO Gai's 7th gate is a little under raikage's v2 but if raikage goes top speed and gai goes 8th i believe gai might win with the simple fact is that the 8th gate is a gate basically to boost up the other gates stats by 2 gates so his speed would be 2 gates faster , strength would be 2 gates faster etc ... you get the point ...
I can't say on this one, Guy hasn't shown his 8th Gates yet. A is faster than Guy in almosts all of the Gates. But then again, I have to see what he can do.