It IS CONTAGIOUS.
It is called HPV, the human papilloma virus. Certain strains cause genital WARTS, and other strains cause Cervical dysplasia which can lead to cervical cancer.
Here is the thing... HPV has NO CURE. YOu still have it, you just do not have any warts present on your penis or testicles.
Your G/F could be with you 10 years and then suddenly get HPV from you.
People have been known to get married, and then 15 years later the woman or man come down with HPV.