Here is a "point in polygon" function I posted quite a while ago. Since you have 60 geoareas, you will need to create 60 sets of coordinates for them and then run your test point against each geoarea in my function until you get a hit. The comment in message #9 might help you as well (it was for triangular areas, but can be adapted to generalized areas)...
https://www.excelfox.com/forum/showt...Polygon-Or-Not