The "oe" sound is pronounced as a long "u" sound, like in the English word "boot." The "g" is pronounced as a soft "g," like in the English word "gear." The "d" is pronounced as a voiced "t," like in the English word "dot." The "m" is pronounced as an "m," like in the English word "man." The "n" is pronounced as an "n," like in the English word "nut." The "r" is pronounced as a guttural "r," almost like the soft "g" in the English word "beige."
Here is a phonetic spelling of the word "goede morgen": "KHOOR-den MOR-gun."