G should keep the unaspirated sound, like in "gato," "mago," and "águila," and J should keep the aspirated sound, as in "jarabe," "jirafa," "gente," "argentino."
שב-G ישאר צליל חלק, "gato"  (חתול), "mago" (קוסם) "aguila"(עייט) ושה- J ישמור על צליל מחוספס  "jarabe" (סירופ) "jirafa" (ג'ירפה} "gente" (אנשים) "argentino" (ארגנטינאי).