West Papua is half of the island of New Guinea, which is located north of Australia.
The pledge of support came Friday at the launch of the International Lawyers Federation for West Papua in Georgetown.
In 1969, Guyana was one of the few states in the UN General Assembly to vote for West Papuans being to exercise freely, their right to self-determination.
Indonesia took over West Papua, which is half of the island of New Guinea from Dutch colonial rule in 1963.
Since then international organisations have accused the Indonesian government of human rights abuse.
SOURCE: http://www.bbc.co.uk/caribbean/news/story/2009/04/090403_nib2115.shtml