Do you know the guitar tuning for song child o or most suitable kind of need to play that song?

Standard tuning (E A D G B E) is the most common tuning for guitar and is suitable for playing the song "Child o' Mine" by Guns N' Roses.

Drop D tuning (D A D G B E) can also be used to play this song and may be preferrable if you want a heavier sound. To tune to drop D, lower the 6th string (low E) one whole step to D.