The G what-now? Lets take a second to look at what the words mean....
Pent = 5 (Five, like a pentagon has 5 sides)
Tonic = First note of a scale; in this case G is the first note
Scale = Sequence of notes ordered Low to high and vice versa
So, the G major Pentatonic Scale is a set of 5 notes played up or down. It works best over any chord sequence in the key of G (Covered in Level 6 01!) and it sounds great over all common pop styles such as acoustic or rock music. Songs it is used in include the intro riffs of ‘Wish You Were Here by Pink Floyd and My Girl by The Temptations.
Guitar melodies are written in TAB (short for Tablature). This is where every line represents a string on your guitar, and the numbers are the fret numbers
G Major Pentatonic scale in TAB
G Major Pentatonic Diagram
Scale diagrams help visualise the scale on your fret board. Each black dot shows where to place your fingers. The circled dots are the G notes, these show you where you should start and end the scale.