Seriously? You are the 1000th man that opens a topic - "can you become a GM in x?" Just stop this, this makes me crazy, and such a stupid question.
From noob to GM in 100 days
Maybe 20 hours a day is too much I agree, but at least 12 a day is needed to reach GM status in 100 days right?

Bullet only helps to memorize openings. So you won't benefit from 1 min games x100 . But you can improve by playing 3 or 4 serious games with 1hr + 30sec increment or 2hr+ 30sec increment etc. Do many tactics puzzles. Don't quit tactics problems unless you have done the anti-blubder check as GM Igor Smirnov says.
Try chesstempo.com If you already tried, spend more time on it
No it's definitly about 700-800 one min. games for 100 days with no tactic training that you can make it to GM status. I read this on facebook and I fully beleive it.

No it's definitly about 700-800 one min. games for 100 days with no tactic training that you can make it to GM status. I read this on facebook and I fully beleive it.
Go for it if you believe it. That's never going to work

no dude. You will improve if you learn from other forum posts and articles like this, The improvement is not becoz of bullet games
Is this possible? If I study 20 hours per day. Play 100 one minute games every day and learn every opening possible?
Will it take more than 100 days?