Welcome to the male fragrance forum of BN, MikeB! Are you talking of my favorite, the unique classic by Givenchy created in 1974? - It's generally referred to as Givenchy Gentleman. For some reason or other Givenchy seems to have made us forget that several other brands also created colognes for men simply called Gentleman as well:
Woods of Windsor (1981)
Max Factor (1986)
Givenchy Gentleman collected 88 reviews (62 positives) here at BN, most of them based on the original formula, now changed.