GV refers to vaginal intercourse (penis in vagina). This is a standard service offered by most sex workers in Switzerland, always performed with a condom—both for STI protection and to avoid “stealthing,” which has been explicitly criminalized since July 1, 2024.
Positions, duration, and changes are agreed upon during the pre-talk or at the beginning. Additional offers for unprotected sex (AO/bareback) are uncommon in professional sex work and are rejected by reputable providers—see also AO/bareback.