As nouns the difference between gallant and servant
is that
gallant is (dated) fashionable young man, who is polite and attentive to women while
servant is one who is hired to perform regular household or other duties, and receives compensation as opposed to a slave.
As verbs the difference between gallant and servant
is that
gallant is (obsolete|transitive) to attend or wait on (a lady) while
servant is (obsolete) to subject.
As an adjective gallant
is brave, valiant or
gallant can be polite and attentive to ladies; courteous to women; chivalrous.