Gul Marayn was a fictional Cardassian officer invented by Kira Nerys in 2370.
Kira used "Gul Marayn" as part of a cover story to explain her runabout's presence in Cardassian territory once it had been detected by a navigational control post.
Upon being contacted by the post, she claimed that a Gul Marayn on Cardassia IV was awaiting delivery of Rulot seeds and that "any delay could ruin the entire crop, not to mention the gul's mood." The Cardassian she was speaking with accepted her excuse. This story allowed her to pass by the navigation post and continue to Cardassia IV unimpeded. (DS9: "The Homecoming")
This character was only mentioned in dialogue.