Gmaj13 = Gmaj7add13
more precisely

e|--2------0------0--|
B|--3------0------0--|
G|--2------4------0--|
D|--4------4------2--|
A|--2------5------2--|
E|--x------3------0--|
   Bm7   Gmaj13   Em

[Intro]
Bm7  Gmaj13  Em   (x2)

[Chorus]
       Bm7                     Gmaj13     Em
Depression and obsession don't mix well
Bm7                            Gmaj13     Em
I'm poisoned and my body don't feel well
Bm7                           Gmaj13         Em
I ate her, inside and out. I feel my stomach turning
Bm7
Make out hill, where we met
           Gmaj13                       Em
We let our lips do all the talking and now I'm hooked and..
Bm7                            Gmaj13      Em
Depression and obsession don't mix well
Bm7
Hollywood motels
         Gmaj13             Em
Hell, I think I'm just obsessed with you
Bm7                              Gmaj13    Em
Depression and obsession doesn't mix well
Bm7
Hollywood motels
          Gmaj13            Em
And all I think I'm just obsessed with you

[Outro]
Bm7  Gmaj13  Em   (x16)