Yes, after studying Manufacturing Engineering at College of Engineering, Guindy you can apply for MTech in Aerospace Engineering from IISc Bangalore, perhaps you need to perform well in GATE Mechanical.

Aerospace Department at IISc has a very low intake of 26 students in the M.Tech program and the accepted GATE Papers are AE, CE, CH, ME, EC and EE.

For more information about GATE Mechanical do follow the link below

https://engineering.careers360.com/articles/gate-2021-preparation-tips-for-me/amp