hi mr.diwakar,
i hope there is no authorised institute for GTS training in india, just like u i am GTS aspirant. u may find some local and unauthorised institues in hyd(in) teaching GTS by some real time GTS consultants.
for learning GTS- u need to have good sap sd background and GTS comprises of 65-70% sd related content and 30-35% mm related content. very few openings for GTS consultants in indian market.
just as i have worked in export house for 5 years and having a diploma in import and export procedures, and working knowledge in exim processes, u need to have similar core background for understanding the GTS concepts.
hope this might be helpful to u and others.
regards,
vishnu