Yes, they are the same however the lock set part number differs depending on year.
12/1989-01/1992 - 69005-10240
01/1992-05/1994 - 69005-10290
05/1994-01/1996 - 69005-10291
So in GT terms that's a difference between a Mk1, Mk2 and Mk3. What the difference is, I don't know.
Similarly there is a choice of steering column lock between a Mk1, Mk2 and Mk3 and also a difference between what I'm guessing would be either a powersteering/non powersteering equipped car or an adjustable/fixed steering column.
There's only one choice for the ignition lock barrel which is 69057-10160.
My advice would be to drill out the old ignition lock barrel and buy another barrel with key and remove a door lock barrel so you can get a key cut for it.