I kinda envy you then...I would have liked to work on these when I retired from the USAF.
I always wondered what these guys looked like...didn’t think they would be that different from a jet engine...
Probably operate on the same principles with one notable exception...GO.
The biggest I messed with was Rolls-Royce RB-211 (42,000 Hp) for the Northern Border Gas Pipeline. At the time, Continental was using the same engine base for 757s.
Some gas turbines in generator service are the same ones used for aviation. With appropriate modifications of course.