I have heard different things about brushing simple syrup on cakes, some swear by it and others say it makes the tops of there cakes gummy. I have started baking my cakes letting them cool about 15-20 minutes, wrap and put in freezer. What are the purposes of simple syrup and does it make the cakes gummy on top? TIA

I too would like to know what others think! I have never tried this either...just laziness probably...one more thing I have to do.

Like you have found, it works for some and not for others.
It can rescue a cake that's slightly over done, but more often is used to add something extra - like lemon syrup, alcohols, coffee...
Try it and see, it's the only way you will know if it works for you!
xx

I generally use symple syrup to add another dimension of flavor to a cake. I use it between layers of cake and I haven't ever brushed it on the top surface of a cake. I have never had it turn a cake gummy but then again I am not trying to soak the cake in it just brush an eveng coating of it onto a torted section both top and bottom before adding filling and putting it together. Simple syrup for me is not done on every cake. I just use it when I feel the need to bump up the flavors in a cake.