The brown spots could be from a variety of problems. I don't know which. It might be a fungus growing on the leaves, brought on by the high humidity and constantly warm temperatures. Gloxinias come from Brazil and are somewhat tropical, growing around Rio, so they should be happy where you are. So, I don't know. Spotting on leaves can also be caused by excessive fertilizing or uptake of something such as salt.

Jon

Thank you Jon. Updates: Although the blotches didn't go away, the plants, as a whole, are still healthy. I have removed all blooms and put the plants in shade house to rest... they don't, they produce new growth.
As I know nothing about gloxinias... I will leave them alone and wait.