Many options here, actually (listed in order of insanity/difficulty):

• you could simply play that G# on the first fret of the G string.

• you could change the fingering to bring the notes closer together

• you could tap that note

• you could use an artificial harmonic to get that high G# from the first fret

This guy was a master at stuff like this and would have done #2 for sure: www.youtube.com/watch?v=DQVNLTPHaX0&pp=ygUadG…