Trying to integrate gcd function

[perfringo]

I am having trouble integrating the gcd function into my first function so that the kasiski function returns the GCD of the list rather than the list. Any pointers?
Do you have an idea of how I would integrate my gcd function?

If function kasinksi returns list of integers then it's should be simple just wrap the resulting list with gcd:

import math

result = math.gcd(kasinski(text))