Initialism of General Services Administration, a U.S. federal procurement and property agency.

Initialism of general sales agent, a company representing an airline in a region.

Initialism of general sales agreement, a contract between an airline and its sales agent.

Initialism of gay–straight alliance, a student club supporting LGBTQ+ inclusion.

Initialism of genders and sexualities alliance, an inclusive school group for LGBTQ+ support.

Initialism of genetic sexual attraction, proposed attraction between close biological relatives reunited as adults.