Final answer:
Gypo is synonymous with Judas Iscariot, reflecting the notion of betrayal as Judas betrayed Jesus in the New Testament.
Step-by-step explanation:
The biblical character that is synonymous with Gypo is A) Judas Iscariot. The name Gypo has been used historically and in literature as a nickname to imply betrayal or treachery, drawing a parallel with Judas Iscariot, who is known for betraying Jesus Christ for thirty pieces of silver according to the New Testament. In some contexts, calling someone a Gypo is akin to calling them a Judas, which suggests they are not to be trusted and could potentially betray others as Judas did.