That will be too tight, as Terminal 2G is separated from the rest of the airport terminals. You will need to take a shuttle bus to the main terminal 2, and go through security. Not likely possible within 20 minutes as that's all the travel time you actually have (saving 10 minutes for deplaning, and 20 for boarding).
Aviation
Anything related to aircraft, airplanes, aviation and flying. Helicopters & rotorcraft, airships, balloons, paragliders, winged suits and anything that sustains you in the air is acceptable to post here.
That's what I thought. But would I have to go through security again? Am I not already inside the airport?
It seems that maybe not security, but there will be passport control according to this transfer guide from CDG
So, I could arrive, right? It's much less time.
Assuming your plane lands on time (unlikely) and you deplane in 10 minutes (also unlikely), the website linked above shows the transit between 2G and 2E to be 30-40 minutes with the passport control. Let's say you catch the shuttle immediately so take 30 to be optimistic (also not likely)
So with everything going perfectly, you will arrive at your departure gate at 09:00, a half hour before departure and probably after boarding has already started
More likely is that your plane will be late landing, some guy will struggle getting his bags out of the overhead, you will just miss your shuttle, the person in front of you in line at passport control will not be able to find their proper documents and you will arrive at the departure gate to see your flight pulling away from the bridge.
It would be technically possible, but unlikely. You say you don’t have much experience flying, so that might make it less likely for you to succeed than a seasoned traveler. Personally I’ve been through CDG three times and found it one of the more confusing airports I’ve been to.
Are you planning to check luggage? Even if you make the connection your luggage might not.
The good thing is it’s okay to arrive at the gate after boarding has started, so you might have a slightly longer window to make it. The airline might stop allowing boarding at a certain point prior to departure, though, five or ten minutes, so you don’t have the full seventy minutes.
You also probably won’t have time to stop to use the toilet in Paris or buy any food/drinks for the flight. All of that is available on the plane but you’ll have more variety on the ground, and a normal restroom is generally nicer to use than the tiny one on the plane.
If I was traveling solo I might still chance it, but be prepared to not make it and have to wait an extra day in Paris, or not have any checked luggage make the transfer. But also I’ve flown internationally 7 or 8 times, so I’m a little more confident in my ability to run through an airport. I would prefer a minimum 90 minute window, though. Even longer if you’re changing airlines/separate itineraries.
That's a very tight layover. You'll probably miss the flight. And they'll put you on the next flight. Just plan for that.
Yeah, we are gonna try. If we miss it, we have a day to watch Paris haha