how to test for Gaussian distribution

Hey, I'm a bit rusty on my stats and i'm coming back to an article i wrote 18 months ago. I think i tested for Gaussian distribution, but now i can't remember!

Anyway, i have used Pearsons R to measure correlation between interval level personality scales. What variable/s do i need to ensure are Gaussian distribution, and HOW do i measure this through SPSS?

Many thanks,