Also note Griff has been consistent in showing the correct key signature for the “key” of each lick.
You could simply choose licks that all have the C Major key signature.
That’s 12 out of 25 licks.
Number of licks by “key”:
C 12
G 4
A 3
E 2
F#, Bb, B and C# each 1
You could conceivably move them all to C and take it from there.
Just noticed that Griff did exactly that in Solo Example 2, moving positions 1 and 4 from G and Bb, respectively. The other 3 are as originally in C.
And moving that first lick from G to C Griff uses as an example of changing string sets and boxes. All the rest of the licks in both solos simply move up or down the required number of frets.