As a government servant, you can generally participate in private workshops or seminars, especially if they are on holidays and you're not receiving any financial benefit or becoming a partner. However, it's crucial to be aware of the Central Civil Services (Conduct) Rules, 1964. While occasional work of a literary, artistic, or scientific nature is often permitted, engaging in trade, business, or paid employment usually requires prior sanction from your department. It's always best practice to inform your employer in writing about your participation to avoid any potential issues.