Find the missing character?

G
A
X
Q

The missing character is A.

The other three characters, G, X, and Q, are all consonants. A is the only vowel.

In the English alphabet, there are 26 letters. Of these, 5 are vowels: A, E, I, O, and U. The other 21 are consonants.

In the question, the first three characters are all consonants. The fourth character is missing. The fifth character is A, which is a vowel. Therefore, the missing character must be a vowel. The only vowel that is not already in the question is A. Therefore, the missing character is A.