Guaranty Trust Bank PLC Wanda aka fi sani da GTBank ko kuma kawai GTB cibiyar hada hadar kudi ce ta manyan kasashe ciki har da Najeriya, wacce ke samar da banki ta yanar gizo/intanet, banki na hada-hada, bankin kamfanoni, bankin saka jari da kuma kula da kadara, tare da babban ofishinta a Victoria Island, Lagos . An kafa bankin ne a shekarar 1988 da sama da matasa ‘yan Nijeriya 35 a cikin shekaru talatin, wadanda a kasarin su sine su Tayo Aderinokun da Fola Adeola ke jagoran ta, amma kuma sun hada da Femi Pedro, Gbolade Osibodu, Femi Akingbe, Akin Opeodu da sauran su. Komai kake da bukata ko a babba ko a karama ka danna *737# a saukake to shiga manhajar su. Kamfanin Guaranty Trust Bank PLC an sanya shi a matsayin iyakantaccen kamfani wanda ke da lasisi don samar da kasuwanci da sauran ayyukan banki ga jama'ar Najeriya a cikin 1990 kuma ya fara aiki a watan Fabrairun 1991. A watan Satumba na 1996, Guaranty Trust Bank plc ya zama kamfani da aka ambata a bainar jama'a kuma ya sami lambar yabo ta Shugaban Kasuwar Hannayen jari ta Najeriya.