The 30 year old winger, who left Dutch side Utrecht in the summer, has been strongly linked with a move to South West Wales in the past week.
Paulo Sousa has been on the lookout for a left sided wideman since he arrived at the club in June and it looks like he’s finally got his man.
Van der Gun scored 17 goals in 3 seasons for Eredivisie outfit Utrecht, and has enjoyed spells at Ajax, Borrusia Dortmund and ADO Den Haag.
As he is a free agent, the Dutchman can sign outside of the transfer window.