Is this sentence a third person sentence Grand Canyon University prepares you for the academic rigor you will face in your first class?

No, the sentence is not written in the third person. It uses the second person pronoun "you," addressing the reader directly. A third-person sentence would refer to someone or something else, using pronouns like "he," "she," "they," or a specific name. For example, "Grand Canyon University prepares students for the academic rigor they will face in their first class" would be a third-person sentence.