"A simple solution..."

It's all in the words. 'Marriage' is defined in the Oxford Dictionary Thesaurus as;"The Legal union of a man and woman."

Therefore there can be no gay marriage according to that definition.

Simple solution, make up a new word for gay marriage, may I suggest "Garriage," replacing the "M" in "Marriage," with the "G" from "Gay," hence "Garriage."

Give "Garriage" the same respect as Marriage, by having a new word, 'Marriage' remains the same holy bond between man and woman and "Garriage" becomes a new institution with a definition all it's own.