Depends on your body build, how explosive you work, rest, nutrition and etc. But you could probably gain 5inches, and some more after you rest for a month.

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Height: 5'6
Vertical: 31'-32'

well everyones different. if u have a pretty low vert, then it will be easier. either way, it seems reasonable.

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Height: 6'2
Running vert 1 legged: 29"
Running vert 2 legged:28"
Standing Vert:24"

Stats per game
PPG:
RPG:
BPG:
APG:
(offseason)

god gotta let me in heaven
all the shit ive been through - The game

well my vert is pretty good, i can almost dunk a tennis ball, im 5'10''. my body fat is somewhere between 5-8%, i get about 8-9 hours of sleep a night. i want to be able to almost dunk a basketball by the beginning of freshman year next fall. after every workout i have some scrambled eggs or some sort of meat.
my body build is pretty muscular with long arms and big hands with long fingers. i also have big feet(size 13) and ankles, and the doc says ill be 6'4''-6'5''

Again, it depends. I did those with a previously injured ankle and I got only 3.5 - 4 inches.

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"Look me in the eye. It's ok if you're scared. So am I. But we're scared for different reasons. I'm scared of what I won't become, and you're scared of what I could become. Look at me. I won't let myself end where I started. I won't let myself finish where I began. Look me in the eyes. I have something more important more courage. I have patience. I will become what I know I am."
-- Michael Jordan