YES! It already IS ILLEGAL. Jeez! Nobody answered because we are all so busy sodomizing each other and having sex outside of marriage with anyone that stops long enough to slip it into.
In all honesty if you cast your mind back to the beginning of this "government" (I use the term loosely) there have been any number of NEW laws against pretty much everything LGBT and all parts inbetween. How many have been finalized.
Booze - check
Gays - check
Trans - check
Adulterers - check
.............
Well maybe I have not been paying attention, but I am unaware of any national laws criminalizing gay-sex. Of course in Aceh they do their own thing, and the MUI (an Islamic Council) have made pronouncements. This article in Jakarta Globe on March 15, 2015
Rights Activists Lash Out at MUI?s Anti-LGBT Fatwa | Jakarta Globe mentions some of this.