 Gemmell akabatana neCeltic achibva kuColtness United muna Gumiguru 1961; akasaina mazwi evechidiki pazuva rimwe chetero nemurwi wekurudyi Jimmy Johnstone, aigara mamaira mashoma kure uye aizovewo nehukama hwakareba nekirabhu. Akanga ari mumwe weLisbon Lions vakakunda 1967 European Cup Final vachipesana neInter Milan, yekupedzisira umo Gemmell akarova chinangwa chekuenzanisa nekupfura kubva kunze kwenzvimbo yechirango. Sezvineiwo, Gemmell haafanire kunge aive munzvimbo yekuisa zvibodzwa, sezvo akange afuratira mirairo yechikwata chekuti mumwe mutambi agare achidzivirira nguva dzese; kurudyi kumashure Jim Craig akange atoenda kumberi, uye ndiye akatamba bhora rakaenzana kuti Gemmell apfure, vese vari vaviri vachifambira mberi mubhokisi reInter. Akapindawo mu 1970 European Cup Finalmuchikundwa neFeyenoord, zvichimuita iye zvino mumwe wevatatu veBritish nhabvu kuti vawane zvibodzwa mumakwikwi maviri akasiyana eEuropean Cup, vamwe vari Phil Neal weLiverpool naGareth Bale weReal Madrid. 