NEW YORK — The president of the Boy Scouts of America, Robert Gates, said Thursday that the organization’s longstanding ban on participation by openly gay adults is no longer sustainable and called for change in order to prevent “the end of us as a national movement.”

In a speech in Atlanta to the Scouts’ national annual meeting, Gates referred to recent moves by Scout councils in New York City and elsewhere to defy the ban.

“The status quo in our movement’s membership standards cannot be sustained,” he said.

Gates said no change in the policy would be made at the national meeting. But he raised the possibility of revising the policy at some point soon so that local Scout organizations could decide on their own whether to allow gays as adult volunteers and paid staff.