Can anyone please help me find my brother?

My brother Neil Boyle and his wife Pat son Martin immigrated to Canberra Austrailia. In 1973 they had another 2 children Gavin born 1978 Geraldine born 1979 Neil and Pat have since divorced they immigrated from Drumchapel Glasgow Scotland. i havent heard from Neil for almost 2 years it is very important that i get in touch with him i believe Pat still has family in the Drumchapel area can anyone please help .....His sister Patricia....Thanks