Hello Leo,
I live in Indonesia with the same issue as yours. we have 80-90 % of humidity throughout the year.
your best way to keep it is to store it in a room with the air conditioner. you can also keeping tracks of your Rh % with hygrometer and de-humidifier.
if that option is too much pricey for you, i suggest you can just keep your guitar in the case every time you are not playing. in addition, put some silica gel inside the case too, and track the Rh level of your case.
i have tried the humidipak system from daddario, or taylor dehumidification system with their charcoal bamboo method. both of these thing not really working well for me. it does lower the Rh level. but not much into certain point you need (45-55%). my best choice is using silica gel, and keep your guitar in the case every time you r not playing. dont forget to alwys keep track of your humidity level.
Goodluck and congrats on your new gibby, cheers