gst on Donations receipt

Dear sir/Madam,


We have a client which is registered u/s 8 of Co. Act, 2013 & also eligible for exemption u/s 12AA of IT Act.
Main Source of income is Donation & Grant Receipt. However, Company is also having service Income.


Please guide us, whether all the receipt is liable for GST or only service Income.

& also we are paying GST on Input exp.


 whether we should book ITC on full exp. or proportionately.