I did this with my ukulele, I'm not too sure about the G6 chord but it was the closest 
that I found.

Intro:

D A G D G D A (x2)

D                   A
If a tree is just a tree
      G               D
Then who and what are we
      G              D
I am you and you are me
           A
Don't you see

        D                A
If the wind is just the wind
            G               D
Where's it end where's it begin
         G                 D
Does it know how long its been
    A
I wonder
                 G    D
Come wonder with me
                 G    D
Come wonder with me


           A
And when times get tough
      A#m                     Bm                       G
And friends they scream your name with shades of fire
          D      A   G6
I'll be waiting
          D      A   G6
I'll be waiting

           D              A
When the flowers up and bloom
   G                D
I can't help but assume
         G               D
That my mind is your own room
                      A
And you're comfortable


       D          A
If a tree just a tree
      G               D
Then who and what are
         G            D
Are we gentle are we free
        A
I wonder

                 G   D
Come wonder with me
                 G   D
Come wonder with me


          A
And when times get tough
      A#m                     Bm                       G
And friends they scream your name with shades of fire
          D      A   G6
I'll be waiting
          D      A   G6
I'll be waiting
          D      A   G6
I'll be waiting
          D      A   G6
I'll be waiting

http://www.thenorthwoodsmusic.com