To reiterate,
G#sus 2 is just a G# with an open d string which you hammer on the 2nd fret(* is the hammer on sign).
G#sus 4 is the same as a G# except the d string is played on the 3rd fret.
G#maj9 comes up later and it's like a G# except the middle note is on the a string not d
This is how Mitch plays it himself.
G#sus2 * G#sus4 x3 G#
G#sus2
i'll start it off by saying i'm not one for the complaining
G#sus4
you wouldn't know it from my writing
G#
you wouldn't know it from my songs
G#sus4 G#sus2 *
but i am different, i am free
G#sus4 G#sus4
i am what you need
G#sus2
G# G#sus2
but oh my god, i miss you more than i thought was possible
G#sus4 G#maj9
i understood the obstacles but you could have tried more
G# G#sus2
because sometimes it seems, i need a mom more than i need to eat
G#sus4 G#
so i didn't eat and i didn't sleep, i'd go all day without a bite
G#sus2 *
and that's not my fault
G#sus4
that's not my fault
G#maj9
G# G#sus2
and i'll admit sometimes my chest gets so tight that i throw fits
G#sus4
you said you'd always be there, where are you through all of this?
G# G#sus2
because this is hard, this is way harder than i thought
G#sus4
i'm so concerned about the ending that i don't even know the plot
G# G#sus2 G#
except for i am different, i am free
G#sus4
i am what you need
G# G#sus2 G#
i am different, i am free
G#sus4
i am what you need
G# G#sus2
so you think of all the things that make you sad
G#sus4
and don't include them in your better half
G# G#sus2 G#sus4
because i'm not like you
G# G#sus2 G#sus4
i don't find happiness in a meaningless existence
G#
i don't know what i'm going to do
G#sus2 G#
but i am different, i am free
G#sus4
i am what you need
G# G#sus2
and yeah, i believe that there's a god
G#sus4
i believe that there is something out there other than my thoughts
G#
i believe it was never science against religion
G#sus2
it wasn't poor against wealth
G#sus4
It was always me against myself
G#
and i'm so scared who's going to win
G#maj9
because i wake up feeling so shitty
G#
it's been so long since you've been with me
G#sus2
i don't know where this old body's going to go
or my soul
G# G#sus4
but i know i am different, i am free
G#sus2 G#
i am what you need
G# G#sus4
i am different, i am free
G#sus2 G#sus4
i am what you need