SAN FRANCISCO — Local plaintiffs firm Altshuler Berzon is gathering kindling for a potential class action against Google Inc., with dozens of current and former female employees claiming their male counterparts made more money.

The news comes weeks after a judge told Google to hand over more data for a U.S. Department of Labor audit that invoked the specter of gender pay discrimination, and just days after an internal, employee-written memo gained notoriety for its denouncement of Google’s “arbitrary” approach to gender diversity.