looking for gabriel martin b, abt 1975 ? in ca

i'mlookingfor my halfbrothergabrielmartinhis from my dad'sfirst marriage , his mother's name isloanne ? maybe spelled wrong, i know he livedin califorinawith his grandparentsdean and flora ? martin
he's eskamo indian , and his grandparents is from alaska .
well if you know anything please e-mail me back asap. my dad and all of his family wants to see him bad ,