Seven years after its legalization, Spain's Constitutional Court is expected to uphold a gay marriage law next week.

At least that is what Madrid daily El Pais is predicting will happen on Tuesday. The paper reported that there is wide support among the court's 11 member panel but there remains a possibility for dissent.

Nearly 20,000 couples have married since Socialists approved marriage equality on June 30, 2005. The law took effect on Sunday, July 3, 2005, making Spain only the third country to legalize gay nuptials behind the Netherlands and Belgium. Canada followed suit 17 days later.

Following passage of the law, the conservative Popular Party (PP) filed a legal challenge.

The PP returned to power in elections held late last year. Party officials have said they would abide by the court's decision. Prime Minister Mariano Rajoy has previously stated that he disagrees with the law.

The upcoming decision was the theme at Madrid's Gay Pride parade on Saturday. Thousands marched through central Madrid under the slogan, “Equal marriage rights. No tampering with equality.”

(Related: Promise of marriage equality law uplifts Paris Gay Pride.)