How to spot GDI/MPI

GDI or MPI engines - pics

OK

4G15 1.6L engine - only as MPI in an io
note straight intake pipe and shorter inlet manifold

1.8L or 2.0L MPI engine - typically in non europe and japan countries
Note curved intake and larger inlet manifold that enters the SIDE of the engine

1.8L or 2.0L GDI engine below (with and without engine cover)
note the intake enters the TOP of the engine, not the side - and has twin camshafts

There are many visual clues

For starters, there will be GDI badges on the rear door & grille, there will be a green GDi ECO light in the tach cluster which should come on when you swtch the ignition on before starting the engine.

When you open the bonnet there will be a large plastic cover over the engine, and if that has been removed, there will be a large rectangular air plenum covering the rear three-quarters of the engine - you will be able to see just one of the four ignition coils - with the MPI engine, almost all of the engine is visible, and there are only two ignition coils.