Looks like his contract expires this summer.
https://www.brightonandhovealbion.com/news/2697158/tom-mcgill-signs-new-contract
Unless Albion have added the 1 year extension contract clause onto it, like they do with most contracts. Can't see us getting much money for him with such little 1st Team...
Personally I would bring Rushworth back to challenge Verbruggen.
Move Steele to the third keeper, he's great keeper to have around the squad and good voice and mentor for the younger keepers.
McGill can be released.