Rovers manager Mark Hughes thought he had the player in the bag, but Goma underwent a St James's Park training session on Tuesday instead.
The Egypt international has until Thursday's transfer deadline to impress.
Gomaa: "I trained with Newcastle's first team and put on a good show."
Roeder has seen two targets (Woodgate and Huth) prefer Middlesbrough, God forbid. And time is running out for the Toon boss.
Why on earth it takes until the last day of the transfer market to rush through a deal and look like desperation, when four months have passed by, you tell me.