So with over 80 million copies sold (as of May 2017) the lowest price I have seen the game is $30. So 30*80 million = $2,400,000,000 is Floor. If you go from the opposite end of $60 per game. $60*80 million = $4,800,000,000 as Ceiling. While not completely true, with microtransactions the game can be higher. The only compareable titles would be Mincraft and Tetris, which both benefited hugely from mobile phones (tablets and phones).

Side Note: Red Dead Redemption sold 60% of what GTA4 sold. So if Red Dead Redemption 2 sells 60% of GTA5 sold on current gen that will be around 14 million copies. 

That's difficult, we actually do not know the cost. They gave a rounded production cost of the original game, but then they re-released the game, sold to retailer, sold online (Valve, Sony, Microsoft all take cuts), production on updates, and so forth.

GTA Online is at over 1 billion in revenue and last quarter was its best so it's not done. 2 billion might happen.

And 100m will also happen for GTAV.

It's the most impressive gaming gross ever in my opinion except maybe WoW or LoL.

Not nearly enough. If you go by the amount of micro transactions in NBA 2K it must've been a complete money sink and brought Publisher Take Two to the brink of bankruptcy.

I would think other games would compare as well.

Hell didn't Pokémon Go make over a billion dollars in less than a year. Quick google shows over 1 billion as of Feb 2017. Don't underestimate a lot of those free games or micro transactions in games. Wouldn't be surprised to see Madden or Fifa with their micro transactions being some of the top. And those are games that last only a year. GTA5 took how many years to accumulate those numbers.

None of those are anywhere near the $5 billion+ GTAV has made..

GTA5, released in 2013. So that is 4 years of sales.

Lets take say Fifa. Fifa 17 on this site has 11 million sales, not including digital. So lets round to 12. http://www.vgchartz.com/game/117272/fifa-17/

The game costs $60 and has very popular microtransactions, so lets say even with some buyers getting the game on sale, the average person spends $70 total on Fifa. Whether is $60+$10 micro, $30+$40 micro, $30 no micro, $60+$500 micro. Whatever you want to say, the average is $70 per person.  

That is 840 million dollars in one year. Fifa is an annual game. That means multiply that by 4 to equal the years that GTA5 has been selling. That brings you to 3.36 billion dollars in the same time frame.

Pokemon Go was 1 billion in a year or less. They ahve 4 more years. Sure htey won't keep that same speed, but it also costs a fraction of a fraction of what GTA5 costs.

Edit: nevermind

The shark card micro transactions are a huge income for Rockstar. It's hard to earn in-game money and most people just use real currency to get their cars and yachts for GTA Online. The it's safe to say that what ever they made at retail was easily doubled by selling shark cards.

I'm guessing the true ceiling for this game is $10 Billion dollars.

Pokemon Go

A little bit of fact checking showed that Pokemon Go made roughly $950 million in 2016. $600 Million was achieved in 90 days, $800 Million in 110 days, $950 in 174 days, and 1.2 Billion in 365 days (one year). While extremely impressive especially for a free to play game, GTA5 sold $800 million in 24 hours and in 3 days crossed $1 billion. In terms of downloads Pokemon Go has 750+ Million while GTA5 has 80+ million, but the barrier to entry with Pokemon Go is minimal.

Fifa

This one is a huge outlier. Fifa 17 sold incredibly well (roughly 17.36 million across 5 consoles), Fifa 16 (16.52 across 5 consoles), Fifa 15 (17.48 across 8 consoles), fifa 14 (16.54 across 9 consoles), and Fifa 13 (16 across 9 consoles). Took roughly 5 years to equal what GTA5 has sold, but a new GTA hasn't come out within 4 years. As a company I would love having both of these IP's. Still GTA is more valuable than the whole Fifa franchise because every sale that FIFA makes, some of that goes back to MLS and other federations within Soccer when they represent that team. EA reported that in 2016 all of their games had a combined $267 Million income with "Extra Content". That includes Battlefield 1, Fifa 17, Bejeweled Mobile, UFC 2, Madden 17, NHL 17, PvZ2, and Titanfall 2 all having "extra" paid for content. 

GTA5 reported $ 500+ million in microtransactions by April 2016. At this point GTA5 had been out for 2 years and 7 months. This information shows that GTA5 makes several million less than the whole EA catalog in microtransactions in a year span.

I'm not sure where your estimates come from, but I think they are a little high assuming each copy sells for $70 including microtransactions. I bought Fifa17 for $25 2-months after release. Not sure what the price is in Europe or how long it stays. Restating, Fifa 17 is a monster in sales and revenue and it seems to have a constant flow of sales. I think GTA5 is on another level.

Sources

https://venturebeat.com/2017/01/31/ea-fifa-17-was-the-best-selling-console-title-in-the-world-in-2016/

https://venturebeat.com/2017/01/17/pokemon-go-generated-revenues-of-950-million-in-2016/

https://venturebeat.com/2017/06/30/pokemon-go-passes-1-2-billion-in-revenue-and-752-million-downloads/

https://www.forbes.com/sites/insertcoin/2016/04/14/gta-onlines-500m-in-microtransactions-could-mean-a-very-different-gta-6/#356a177d3c6d

VGChartz