What happens after graduating from the Green to Gold program?

If you are coming from Active duty you will stay on active duty while doing green to gold and and commission back onto active duty. Your branch is what you put in for. Your degree or mos play no factor in it. You rank your branches from 1-16 and based on GPA, PT scores, LDAC grade, cadre recommendations you will get assessed against cadets nationwide.

The army is strange when it comes to education. Unless your degree is in medicine or law you will go wherever the army needs you. You will prepare a preference list while in your MS3 year but ultimately it will be the army's choice. As far as reserves vs active duty, once again you will get a vote, but the army will decide. In 2004 when I graduated, those that wanted reserves or guard usually got their choice, but those that wanted active didn't necessarily get active duty. It may have changed. Your best bet it's to talk to your Professor of Military Science (PMS) at whatever school you go to.

I would agree with most everything said here. I think when they are looking at a person's branch choices they look at different things. If you're looking to go infantry they may look at your APFT and how involved in things like Ranger challenge you were. If you're going to be finance or something more technical they may look more at your degree, if for example you're a master gunner or Ranger qualified that would be a huge influence.

You'll have to rank all the branches on your "wish list" at the start of your MS4 year. There is a good chance you'll get branched in one of your top five choices, but needs of the Army, and degree will play into the determination by the accessions board. The chances of you getting reserve forces duty on a Green to Gold Scholarship are pretty low. If you go Green to Gold without the scholarship, than it's very possible.