Did God Ever Appear to Adam in the Garden?

Yes, God appeared to Adam in the Garden. After the Fall, Adam hid himself when called by God. ---- No, Allah(God) Almighty never appeared to Adam pbuh,. The Messenger described Allah, as "His veil is Light, if He unveils it, the Light of His Face will burn all what His Sight reaches (which is everything!)" [Muslim]

Quran 6:103 "No vision can grasp Him, but His grasp is over all vision..." (When the people of Paradise will be gathered in a beautiful place) So the Lord - Blessed and Exalted - will laugh to them and say: 'O People of Paradise! Where are those who used to obey Me without having ever seen Me? This is the Day of Increase!'

So, they will all give the same response: 'We are pleased, so be pleased with us!' So, He will say: 'O People of Paradise! If I were not pleased with you, I would not have made you inhabitants of My Paradise! So, ask of Me!' So, they will all give the same response: 'Show us your Face so that we may look at it!' So, the Lord - Mighty and Majestic - will remove his covering and will majestify them and will cover them with His Light, which, if Allaah - the Exalted - had not Willed not to burn them, would have burned them. So, how sweet is this speech to the ears, and how cooled are the righteous eyes by the glance at His Noble Face in the Afterlife…