The 18-year-old winger - son of current Scotland U17s coach Dean Gorre - is training with the SPL giants with a view to a permanent switch to Celtic Park.
Red Devils boss Sir Alex Ferguson took the decision to release the talented teenager just before the close of the transfer window, as he did not progress under the tutelage of Old Trafford coaches as well as had been anticipated.
Gorre was highly rated as a youngster, so much so that Chelsea tried to steal him from under Manchester United's noses, and entice him to Stamford Bridge when he was just 15.
His lack of development means Chelsea are unlikely to still retain an interest in the forward's services, though, allowing Celtic manager Neil Lennon to step in and secure the player's signature.
Gorre joined the Premier League leaders in 2002, and has featured for both United's youth team and reserve sides.