Please advise what is it called when you are allergic to general anesthesia ?

General anesthesia: Allergy to general anesthesia is called 'allergy to general anesthesia'. At times the reaction may be more specifically indentified as urticarial (hives) or anaphylactic (low blood pressure).

No such thing: There is no such thing as being allergic to general anesthesia. General anesthesia is a garbage can term for a mix of a ton of different medications that are used in anesthesia. If you have an allergy it is usually specific to one component that can be easily swapped out.