The GCD of given numbers is 1.
Step 1 : Find prime factorization of each number.
$$\begin{aligned}160485 =& 3\cdot5\cdot13\cdot823\\[8pt]2 =& 2\\[8pt]127104 =& 2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot3\cdot331\\[8pt]14 =& 2\cdot7\\[8pt]\end{aligned}$$(view steps on how to factor 160485, 2, 127104 and 14. )
Step 2 : Put a box around factors that are common for all numbers:
$$\begin{aligned}160485 =& 3\cdot5\cdot13\cdot823\\[8pt]2 =& 2\\[8pt]127104 =& 2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot3\cdot331\\[8pt]14 =& 2\cdot7\\[8pt]\end{aligned}$$Note that in this example numbers do not have any common factors.
Step 3 : Multiply the boxed numbers together:
Since there is no boxed numbers we conclude that $~\color{blue}{ \text{GCD = 1} } $.