Yes, Elizabeth, I'm sure your uncle and I would have plenty to talk about. The Gaumont was in Park Rd. East, opposite the park entrance.
If he can still read, he would be interested in the book "The Silver Screens of Wirral" which Pinz. linked. As a matter of record, the volume covering Birkenhead & Bebington lists 24 cinemas and the second volume, covering Wallasey and the rest of Wirral lists 35. You can get them on Amazon.
Next time you talk to your uncle, mention Kalee projectors and Westrex sound systems; that should get him going.
No sadly he can't read he's blind now
I tried to see if I could get that book you mentioned on some sort of audiobook site, but sadly it wasn't available. Perhaps I'll buy it anyway and read it to him when I visit.
Now, if I mention the projector and sound system you speak of, he'll ask how I know them and then I'll be left looking stupid! (I'll still mention them though and may be I'll come back to you through here with questions)