"I'm so happy and so glad to hear this," says Monica Taher, people of color media director for GLAAD.
She worked last year on the group's project to get additional papers to publish same-sex union announcements.
The New York Times' decision last August to begin publishing same-sex union announcements was a watershed, she says.
Since then, many more papers have begun publishing such announcements, she says.
At some papers, executives had argued that printing same-sex announcements was tantamount to taking a political stand, but GLAAD representatives responded that not running them was also taking a political stand, she says.
Pamela Strother, executive director of the National Lesbian and Gay Journalists Association, also praised The Morning News' new policy.
"It's fantastic that The Dallas Morning News has moved forward on this," she says.
"It shows that a newspaper in a region that might be seen as conservative is willing to step out on this."
NLGJA leaders have also been meeting with newspaper executives, including The New York Times' publisher, says Robert Dodge, last year's president and a writer in The Dallas Morning News' Washington bureau.
There was never any homosexual marriage, and no "gay" subculture. A married man might have boys on the side.