THEORY
GUITAR CHORDS
TABLETURE OF MOVEABLE FOUR STRING CHORDS
1. ROOT IN THE BASS / MINOR

Chords by the numbers
Numbering fingers:
1. index    2. middle     3. ring      4 pinky
G is located between 2nd and 3rd frets
or third position.

MORE ON THE KEY OF G
All F's are presumed to be sharped and all B's natural unless marked.
In the key of G Major the dominant 7th or flated 7th tone of the G major
scale is F natural. The minor 3rd is B flat.
These are called accidentals.
Although no accident - they add surprize or resolution to a progression.
Technically G Minor is the relative minor of the Key of Bb although that
needs to be established by starting in or modulating the progression
into Bb for that to be true, otherwise it is a passing chord.