If you are referring to the actual Golden Gloves tournament then you may not be able to enter (for a few reasons).
A: Are you registered with USA boxing?
B: Do they have a novice division of the tournament for match bouts? GG is a national advancing tournament, you have to have a minimum of 5 bouts to enter and often times you'll be matched with someone with a significant amount of experience.

But you can't do anything until you are a registered athlete. And I wouldn't recommend entering a bout with no training.

Honestly, if you're 32 and have no intention of joining a proper boxing gym, you should just do toughman or club boxing. Bare in mind that once you do one of those you are barred from amateur boxing for life. But you only have 3 years left to compete as an amateur anyway.