Here's a strategy to tackle General Accounting Principles (GAP) for the UPSC EPFO exam:

Grasp the Fundamentals:

Double-Entry Bookkeeping: This is the foundation of accounting. Understand how every transaction has two sides - debit and credit - and how they impact accounts.
Accounting Equation: Master the equation: Assets = Liabilities + Equity. This forms the basis for understanding financial statements.
Focus on Key Areas:

Accounting Cycle: Familiarize yourself with the steps involved in the accounting cycle, from recording transactions to preparing financial statements.
Journal Entries: Practice recording various business transactions through journal entries. This reinforces understanding of debits and credits for different accounts.
Ledger Accounts: Understand the different types of accounts (assets, liabilities, capital, revenue, expense) and how they function.
Financial Statements: Gain a thorough understanding of the Balance Sheet, Income Statement, and Cash Flow Statement. Be able to interpret the information they provide.
Accounting Standards: While not super in-depth on the exam, having a basic grasp of Indian Accounting Standards (Ind AS) can be helpful.
Resources and Practice:

Study Material: Utilize recommended books or online resources that cater to the UPSC EPFO syllabus for GAP.
Previous Years' Papers: Solve questions from past UPSC EPFO exams to understand the weightage of different topics and the type of questions asked.
Mock Tests: Take mock tests to assess your understanding and identify areas needing improvement.
Additional Tips:

Focus on clarity: Strive for clear and concise explanations in your answers.
Presentation matters: Present your answers well-structured and easy for the examiner to follow.
Practice calculations: Be comfortable with basic accounting calculations like depreciation and accruals.