Queries on Stock/ETF gifting.

Hi All,

I am thinking of gifting stocks/ETFs(Gold/Silver) to my Father so that I can save on LTCG/STCG tax. My father's income is very less which is below the tax exemption limit. I will be selling the gifted stocks/ETFs in future from my father's demat account and transfer the money back to my account.

1. Can you guys please let me know the DOs and DONTs regarding this.
2. Anything that I need to be careful of? 
3. Can there be any issues during ITR filing or with IT department in general?
4. Do I need to create a gift deed mandatorily? Do I need it for every gift transaction?

Thanks in advance!