Several Latin American countries or cities have legalised same-sex civil unions, but these
generally confer fewer legal rights than marriage.
Civil Unions are always inferior to marriage, because even if the country makes the them completely equal, international law refuses to accept them as equal to marriage.
Also, once gays get civil unions, the government says we got our equality, even though you can easily prove it's not equal, so they won't do anything else for us.