Video Tutorial Explains it all

*TEXT TUTORIAL*
1. just like the old gta god mode glitch go to the strip club and
request a job from anyone on charachter and have some cash on you

2. Request a dance by this dancer right here by the name of nikki
she is the only one that can make this glitch work!

3. After you have requested the dance walk as fast as you can to the
private room and go the third chair along the isle like so

4. Spam X on your controller to jump up the seat and request and
accept the job as fast as you can

5. once your in the job menu back out and you will have no head like
the old god mode glitch, run out to the entrance like so and take cover
your head will spawn back and you will have godmode