Liddle spent six years with the Pools between 2006 and 2012 and after struggling to secure a regular starting place since joining the Saddlers last summer is said to be happy to return to the National League side.
The 33-year-old re-joined the Victoria Park club on an initial one-month loan back in December and has featured eight times so far.
Gary was among a whole host of players who joined the Saddlers last the summer and went on to make sixteen first-team appearances before departing on loan.
We would like to join the club in wishing Gary well for the remainder of his loan spell.