Gill OB/GYN Medical Group, Inc. is the largest OB/GYN Medical Group in the San Joaquin County. With 65 years of experience and roots dating back to 1953, Gill Obstetrics has a rich history of serving generations of women throughout San Joaquin County. We offer clinical expertise and compassionate care to give our patients the best care for ...Meet Our Providers‧Our Services‧Contact Us‧GYN Services‧Contraception‧Surgical Services.