If i do not ejaculate into my girlfriend during intercourse, can i still get genital warts?

Yes: Human papilloma virus (hpv ) which causes warts is not merely spread in the ejaculate, but is actually present in the skin. Any contact in which two genitals touch, even with external rubbing, can cause the spread of genital warts.

Yes: Whether or not one ejaculates has no bearing on whether or not you can get genital warts (hpv). Hpv is passed though direct skin-to-skin contact of the genital area.