If the prop was stored protected from the elements you shouldn't have any problem. Tell tail signs of potential issues are hazing of the clear coat, any visible cracking or delamination in the wood grain, or dark spots which may indicate mold or rot. If I were concerned, personally it would be worth it to me to send it in and have it inspected professionally. When you weigh the potential risk and costs from the damage that may occur if it failed in flight, the cost of shipping and inspection doesn't look that bad.... That being said, I know lots of guys who have been flying wood GSC props that are decades old with hundreds of hours on them without issue and am personally flying with a 3 blade 66" right now with confidence.

Good luck,