While the unions wonâ€™t be legally recognised as marriages, Gay Star News reports gay rights campaigners believe it is a large small step on the path to equal rights.
The Government has taken the step after fines were given to a gay and lesbian couple who chose to have a marriage ceremony in the southern provinces of Kien Giang and Ca Mau.
Gay rights activist Le Quang Binh says the nation is going the right way in the fight for same-sex marriage.
â€śThis might be the first step, but it will still change peopleâ€™s lives for the better.â€ť
Meahwhile Taiwan is reviewing a bill aimed at legalising same-sex marriage.
It needs to get through three readings in the nationâ€™s legislature to be successful, and itâ€™s unclear how long that will take or whether it will gain enough support.