GST v DEPRECIATION

GST is only for purchases and sales

You can read the blog to  uunderstand GST Registration:
https://rajanmodi.com/2018/04/03/complete-guide-gst-registration/

If you claim depreciation on GST paid while purchasing the fixed asset then you cannot claim ITC on the same and vice versa

as per gst act, you can not claim both benefit either you claim the depreciation on including gst amount of fixed asset or claiming gst credit on such fixed asset and claim depreciation on ex  gst amount .