Do these pictures help?
https://www.retrobike.co.uk/threads/gt-hadley-rear-axle-or-rear-hub-for-parting-out.384263/
Sort of looks very Hope xc in construction. If there are no threaded rings holding the bearings in place, it looks like a soft hammer jobby.
Is this thread any help:
https://www.retrobike.co.uk/threads/gt-hubs.424490/