updating DIRECTORY.md

Author: github-actions

Diff for: DIRECTORY.md

@@ -557,6 +557,7 @@
   * [Gamma Recursive](maths/gamma_recursive.py)
   * [Gaussian](maths/gaussian.py)
   * [Gaussian Error Linear Unit](maths/gaussian_error_linear_unit.py)
+  * [Gcd Of N Numbers](maths/gcd_of_n_numbers.py)
   * [Greatest Common Divisor](maths/greatest_common_divisor.py)
   * [Greedy Coin Change](maths/greedy_coin_change.py)
   * [Hamming Numbers](maths/hamming_numbers.py)