Okay, so I'm new to buying digital games. I mostly buy physical copies only. Now I have got the Witcher III Free game with my GTX 970. So, I want to know if it will be available to pre-load here. Like I will download the game earlier and it will unlock for playing on release date ?

They confirmed that they will be preloading the game, they just haven't announced the date yet.

Here the official post about preloading:
http://www.gog.com/forum/general/witcher_3_wild_hunt_redownload/post5

Oh.. Thanks to both of you for helping. :)

Welcome to GOG Respawn_Agent, and for all of you youngins out there, here is the Respawn Code: A-B-B-A

Enjoy! :D