CBG is moderately/mildly psychoactive, that does not mean that the concentration of other cannabinoids/terpenes within the plant were not, but alone I notice that when I smoke CBG I get a light headed feeling with a slight pleasant dissociation. I do not think I am “high” but definitely altered.
I’m a fan of a full rounded cannabinoid profile with noticeable amount of CBG, I tend to like those strains to help with chronic pain conditions as well (CBG topically applied is wonderful for spot application pain relief)