Tremolo picking while trilling with the fretting hand and sliding down to around the 2nd fret by the end of bar 63, this lick is likely inspired by Jeff Beck, of whom Gary was a big fan. This will take a little work to nail, but if you at5tack it with confidence it shouldn’t take too long.
a variation on the main theme – returning to the neck pickup and rolling the volume down slightly between bars 70/71 for dynamics – and a touch of dorian mode (a-B-C-d-E-F#-G) with that F# in bar 71. Crank the volume all the way back up for the sustained note in bars 72-75. Good luck!