What does the G fingering of guitar mean?

G fingering on guitar refers to arranging the accompaniment of songs with G chords.

If you don't need to edit the tone sandhi of a song originally in G key, there are 2 tones in A key sandhi, 3 tones in B key and 4 tones in B key.

Because each key uses a different set of chords, please look at the chord diagram of each key below.

In other words, each key is mainly arranged by the triad of 1-6 in this key, and the other 7 chords, 9 chords and hanging chords are all changed on the basis of this main chord.

For example, the Hometown you mentioned was originally in B key, and you arranged the third fret with G key and chord fingering. If it is arranged in B flat, it should be that the chord in bB is not sandwiched, and the chord series can be replaced accordingly, for example, G is replaced by bB, D is replaced by F ... Look at the chords of G and bB below.