GF is an abbreviation for girlfriend, which refers to a female partner in a romantic relationship. It is common slang used in English and can also be shortened to "girl" or "gal." Synonyms for GF include significant other, sweetheart, partner, companion, love, better half, soulmate, and lover. These words all convey different levels of intimacy and affection, ranging from a casual dating relationship to a committed, long-term partnership. Using synonyms for GF can add variety to your language and make your communication more interesting and expressive. Remember to choose the right word that best reflects your relationship with your significant other.