What will I need to do to make a international-to-domestic connection at GRU?

My wife and I are flying BOS–GRU–GIG soon. Our tickets were purchased as a single itinerary from LATAM. As we do not speak very much Portuguese, it would help us to know what to expect as we make the connection at GRU. Specifically:

We will clear customs & immigration upon arrival in GRU, presumably. Will we need to reclaim and re-check our luggage as part of this process? If so, do we need to take our baggage to the departures hall, or is there a place near the international arrivals area to re-check bags?
It appears that we will be arriving in Terminal 3 and departing from Terminal 2 (correct me if I'm wrong here.) Is there a way to transfer airside between these terminals, or will we have to exit security in Terminal 3 and then re-enter security in Terminal 2?

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Is immigration required for connecting flights?

A passenger who has reserved their whole journey with one booking will be able to board their onward flight without having to clear immigration. Their baggage will be transferred to the connecting flight for them, whether both flights are with the same airline or different ones.

Where does immigration happen for connecting flights?

At the Gateway Point you will arrive at domestic terminal and you may proceed to the international terminal/departure lounge to complete Immigration and Customs Check formalities. Your Baggage would be directly transferred to the International Flight.

How do you connect international flights?

To change planes for a connecting flight, start by asking a flight attendant on your flight or reviewing the Departures board in the airport to find your departure gate number. Then, if your luggage hasn't been checked through to your final destination, pick it up from baggage claim and go back through security.

What is a domestic connection flight?

A domestic flight is one that takes place entirely in one country; both the departure and arrival cities are in the same country. For example, if your itinerary includes a flight from the US to Paris, and then a flight from Paris to Nice, the Paris\u2013Nice flight is the domestic one.

GRU Airport Connections: From T2 Domestic to T3 International

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