Is is possible that the atoms and molecules of gases get attracted to us? due to the gravitational force?? As our mass is a lot more than the atom, and distance too isn't much, so is it possible?

Answer 1

Yes, any two objects in the universe will be attracted to each other by some equal force dictated by the universal law of gravitation:

F = F1 = F2 = (G*m₁*m₂)/r² where m₁ is the mass of the atom/molecule of gas and m₂ is the mass of the person

This force is proportional to the masses of the two objects in question so that force would be quite small given the small magnitude of the masses of single atoms and molecules of gas. The force would likely be on the magnitude of ~10^-20 which is why you would not feel this force.