ALBUQUERQUE — About 180 gay and lesbian former military service members who were discharged due to their homosexuality will receive the rest of their severance pay under a settlement approved Monday by a federal court.

The American Civil Liberties Union said the $2.4 million settlement covers veterans who received only half of their separation pay under a policy that went into effect in 1991, two years before the ‘‘don’t ask, don’t tell’’ policy that banned openly gay soldiers from serving.