He wouldnt suit the way Jose currently plays.
Jose likes our wingers to cut in and play in between lines, so really you have to be good in tight spaces.
Before the Swansea game, Jose said,
"Alexis is different to Marcus [Rashford] because Marcus needs more space. Alexis, in small spaces, can manipulate the ball better and is trying his best to be one against one. So the decisions are based on that."
Although Bale on his day is world class, like Rashford, he needs space. If he gets that, he can be devistating, but it seems Jose prefers players who are suited to a narrow system, hence why he prefers Lingard and Mata over Rashford and Martial.
Having said that, Jose was after Perisic, who, is very much like Bale, in that respect. Strong, powerful, direct winger, who keeps the width.
Definately dont think Mourinho would turn down Bale if he was available.
I have always liked width on at least one side of the pitch. Having Bale hugging the touchline, with Sanchez cutting in from the left could be a joy to watch.