please correct me if im wrong. this chords based on hearing so maybe not match but pretty close 
credit kpoplyrics.net

GIRLS GENERATION GOODBYE 4TH MINI ALBUM


F#m                Bm                    A                      Db  F#m
  Dwie museun daesareul halji aneun geujeo geureon deuramacheoreom
           Bm                    A                 Db
Oneul niga naege eotteon mareul haljido neomu algesseo
Bm                F#m            B      E
Chungbunhi yesangdoen jinbuhan seutoriya

   D              Db                   F#m
Oh bamsae nanun yaegiwa jeojeun geu nunbit
  A                        D     Dbm            F#m     A
Seotuldeon neoui gobaekdo ijen bukkeureoun ilgicheoreom sumgyeojigo
D            A                 F#m          A                  D 
Maeil dulmanui baegya sok nege mutdeon buranhan miraekkaji jeonbu
   Dbm    Bm            G       F#m
Annyeong, really really good goodbye

                    A               D     Bm            Dbm  F#m
Hanttaeneun naega neo eobsin sum swigido himdeun jul arasseo
                    A                 D               Bm      
Geuttaeneun niga nareul jonjaehage mandeun sinin jul arasseo
      F#m     A            B     E
Jogeum aswipjiman minmanghan iyagi

     D              Db                   F#m
Oh bamsae nanun yaegiwa jeojeun geu nunbit
  A                        D     Dbm            F#m     A
Seotuldeon neoui gobaekdo ijen bukkeureoun ilgicheoreom sumgyeojigo
D            A                 F#m          A                  D 
Maeil dulmanui baegya sok nege mutdeon buranhan miraekkaji jeonbu
   Dbm    Bm            G       Bm
Annyeong, really really good goodbye

    F#m      Dbm                 F#m         
Manyak naega maedallyeo ni mameul dollyeodo
Bm           F#m                        A        E    
  Geu daeume geu daeumen banbokdoel ppunijannni oh yeah

(SAME CHORDS FOR CHORUS)

Sueobsi ipsul kkaemulmyeo beotyeotdeon maeumi ijen jichin geolkka

Anim naega neomu keun gidael haetdeon geolkka moreugesseo

(Gidaehaenneunjido molla na)

Waenji naeireun biga ol geotman gata

Memareun naege ppuryeojwoyo

Annyeong, really really good goodbye

 
Yeah oh yeah

(same chords till end)

 D     Dbm             Bm       G   F#m   A        D
    Eoryeotdeon sigan really really good goodbye (goodbye)

Eojeui naneun (really really good goodbye ooh)

Ijeneun annyeong, really really good goodbye

(Oh yeah, oh yeah)

Good good really really good goodbye