Therefore , T is the next letter in the sequence.

If we count the letters:

• $A$ is the first letter counting from $A$ to $Z$ , and $Z$ is the first letter couting from $Z$ to $A$ .
• $D$ is the fourth letter counting from $A$ to $Z$ , and $W$ is the fourth letter counting from $Z$ to $A$ .

$G$ is the seventh letter counting from $A$ to $Z$ , and if we count seven letters from $Z$ to $A$ , we will get the answer, that is $T$ .