GRU Terminal 3 to 2 transfer Lanside
 

Hello,

For various reasons I wont go into atm I'm landing into GRU and have another flight from T3. Separate tickets but I have plenty of time.

I have to get to T2 departures because I cant check in online for the GOL flight.

Can you walk from T3 to T2 landside? I've read about the airside walk way but not a landside one.

Yes you can walk from T3 to T2 land-side, assuming you do not need a visa to enter Brasil or have one if you do.

adding:
Walking takes about ten minutes and is actually quite nice provided it doesn't rain and you don't have lots of luggage to carry. There's a few high curbs to climb, which makes for adventures with luggage carts :).
There's also a landside inter-terminal shuttle bus between the two terminals.