Nope, you have no risk at all. You used a condom when you gave and received, which protects you from gonorrhea orally and genitally.
Syphilis is only infectious when sores are present. Since you didn't see any (you'd have mentioned it of you had), and since you used a condom, I wouldn't worry about this at all. Syphilis is fairly uncommon, too, so odds are that your partner doesn't have it.