Xbox gold pass

I currently have purchased one year of Xbox Live Gold and I have on my Xbox right now a second profile that is The Game Pass free month in that game pass is getting ready to end in January of next year

and I already have put my Xbox Live Gold 12 account and I'm wondering what's going to happen once month is after the game pass and also I'm wondering how to buy can you pass your ad with my two year on my account

:)