Gorkhaland Territorial Administration (GTA) chairman Anit Thapa met West Bengal Chief Minister Mamata Banerjee here and discussed various issues related to the development of the Darjeeling Hills. The 45-minute-long closed-door meeting was held at the chief minister's chamber in the state assembly in the presence of senior minister Aroop Biswas, who is also the in-charge of TMC's Hill affairs.