GAAP or Gaap may refer to:

• Generally accepted accounting principles, a standard framework of guidelines for financial accounting
  • Generally Accepted Accounting Principles (Canada)
  • Generally Accepted Accounting Practice (UK)
  • Generally Accepted Accounting Principles (United States)
  • French generally accepted accounting principles
  • Russian GAAP

• Golgi anti-apoptotic protein
• Gaap, a goetic demon
• Gruppi Anarchici d'Azione Proletaria, an anarchist grouping in 1950s Italy