The electronics changes and slight changes to the wing tips to carry the ALQ-218 may make it enough of a change to call it a "G" (but I don't think it is). It is still less of a change to the aircraft and systems than the A-C change was, but it is semantics any way you look at it.
There's already a EF-18A... in my opine, the "G" could easily be called the EA-18F
There's already a EF-18A... in my opine, the "G" could easily be called the EA-18F