Sentinel 1 GRD data in GEE

Hi sir,
Now I’m working on S1_GRD data using the google earth engine. I have a doubt whether the data which is available in GEE is already pre-processed or not. If we need to pre-process, what are the things need to pre-process

If you want to no things about GEE please ask GEE.
Have a look at the GEE FAQ. At the end there they mention contact points.

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yeah ok thank you, sir

It has been processed with SNAP, like Marco said the GEE-people have the details.