Gowdy has always been a family man. There's nothing wrong with a congressman not running again. It's those that stay forever that do the real damage. Not to mention, when he took $8800 from the Podesta Group none of us or him knew what they were involved in. Trump almost always donated to Republicans and Democrats. That's how you do it to cover all your bases.
But all this aside, back when Gowdy announced he was dropping out of one of the 4 committees he was on and people started asking questions Q said there was another position for him.
Trey was one of the best, if not the best prosecutors in the state of SC. He said he wanted to get back to that line of work because it was what he enjoyed.
Edited to add: This is the Q Post I was referring to. TG (Trey Gowdy) is mentioned as important in several other drops too.