How do I transfer money from Coinbase to Gemini?

Could you please elaborate on the steps involved in transferring funds from Coinbase to Gemini? As a user, I'm interested in understanding the process in detail. Is it a direct transfer, or do I need to take certain precautions? Are there any fees associated with the transfer, and how long does it typically take for the funds to arrive in my Gemini account? Additionally, are there any limitations or restrictions I should be aware of before initiating the transfer? Thank you for your assistance.