Garuda Indonesia is reopening an earlier closed down route: Yogyakarta - Singapore as a direct flight. As a real Indonesian state company there is no info about this re-opened route at the website. I just noticed one big advertisement at an intersection here in Yogya.
If I try to look for prices and schedules on the website it only gives a route via Jakarta. So far not a good start at all, but hey.. it's Garuda Indonesia of course.. Don't expect the clarity you would expect from AirAsia if they open a new route (hopefully they will open the same route some time soon).