For those of you that have been hiding under a rock today (if you have been, congrats on a great self-isolation strategy!), the Epic Store has made GTA V free for this week, and if you get it now, you can keep it forever (or until the Epic Store goes down, whichever happens first).
Since the announcement, the traffic has pretty much brought down the Epic Servers, so you might have to wait for a while until you can claim it. (I have not been able to claim it myself).