where is the keys Am on a keyboard/piano?

Question

like im trying tolearn when your gone by avril lavinge
and it goes G D Am for the first line of the song.

Answer 1

There is no such key (Am) on the keyboard.

G....D...Am (AMinor), are chords.
Those may be intro only without melody notation.

Go here to see piano chords and the notes of chords.
http://www.looknohands.com/chordhouse/piano/

You can print these.

Answer 2

It sounds like guitar music. Try a flat, I'm thinking its a minor. Good luck!

Answer 3

those are chords, not keys

G= G B D
D= D F# A
Am= A C E