Geological Survey of India (GSI) is an organisation working under the Ministry of mines. They have regional offices at Lucknow, Jaipur, Nagpur, Hyderabad, Shillong and Kolkata (head office also). The main objectives of GSI are ground, air borne and marine surveys for national geoscientific information and mineral resource assessment, mineral prospecting and investigations, multi-disciplinary geoscientific, geo-technical, geo-environmental studies, glaciology studies, natural hazards studies, seismotectonic studies etc.
They have many departments like survey teams, laboratory, research laboratories, data centres, management of scientific data and scientific expeditions, collaboration work with industry etc. I do not see any problem for a qualified person to apply there as geologist and depending on one's interest the type of job is generally allotted in such big departments. In the beginning, one might have to work as a surveyor in remote places with the survey teams as technical people have to earn that experience without which one might not be able to contribute in the organisation but after some time one can easily get a job in scientific data interpretation and other coordination activities. So, the apprehension shown in this query is not a serious one. One would get rest period and holidays after the survey tenure as per the regulations of GSI and would get the house facilities etc also as per the Govt of India rules and regulations. Overall it is a prestigious job.
Knowledge is power.