Many guitar players like to use the modal system. A very sweet sound mode which Carlos Santana seems to use a lot is the Dorian Mode, Mode two of the Major Scales. The G Dorian mode is built off a F major scale, F G A Bb C D E F G, but it starts on the second note instead of the first e.g. G A Bb C D E F G.
It’s usable over a G Minor scale in the key of F. Try it against a Gm7, Gm6, Gm9, Gm11.
I have done two simple versions in my Guitar TAB and Music Notation, one is without open notes and the other with open strings. I love the sound of open strings on acoustic guitar.
To download the printable version click the link g_dorian