Persistence not working for GPS location formatted XX.XXX75788937955,-X.XXXX170208076405

The issue might be a difference in the two existing influxDB persistence services

conversions for org.openhab.persistence.influxdb

    /**
     * Converts {@link State} to objects fitting into influxdb values.
     *
     * @param state to be converted
     * @return integer or double value for DecimalType, 0 or 1 for OnOffType and OpenClosedType,
     *         integer for DateTimeType, String for all others
     */
    private Object stateToObject(State state) {
        Object value;
        if (state instanceof HSBType) {
            value = ((HSBType) state).toString();
            logger.debug("got HSBType value {}", value);
        } else if (state instanceof PointType) {
            value = point2String((PointType) state);
            logger.debug("got PointType value {}", value);
        } else if (state instanceof DecimalType) {
            value = convertBigDecimalToNum(((DecimalType) state).toBigDecimal());
            logger.debug("got DecimalType value {}", value);
        } else if (state instanceof OnOffType) {
            value = (OnOffType) state == OnOffType.ON ? 1 : 0;
            logger.debug("got OnOffType value {}", value);
        } else if (state instanceof OpenClosedType) {
            value = (OpenClosedType) state == OpenClosedType.OPEN ? 1 : 0;
            logger.debug("got OpenClosedType value {}", value);
        } else if (state instanceof DateTimeType) {
            value = ((DateTimeType) state).getCalendar().getTime().getTime();
            logger.debug("got DateTimeType value {}", value);
        } else {
            value = state.toString();
            logger.debug("got String value {}", value);
        }
        return value;
    }

and for org.openhab.persistence.influxdb08

  /**
   * Converts {@link State} to objects fitting into influxdb values.
   * 
   * @param     state to be converted
   * @return    integer or double value for DecimalType, 
   *            0 or 1 for OnOffType and OpenClosedType,
   *            integer for DateTimeType,
   *            String for all others
   */
  private Object stateToObject(State state) {
    Object value;
    if (state instanceof DecimalType) {
      value = convertBigDecimalToNum(((DecimalType) state).toBigDecimal());
    } else if (state instanceof OnOffType) {
      value = (OnOffType) state == OnOffType.ON ? 1 : 0;
    } else if (state instanceof OpenClosedType) {
      value = (OpenClosedType) state == OpenClosedType.OPEN ? 1 : 0;
    } else if (state instanceof HSBType) {
      value = ((HSBType) state).toString();
    } else if (state instanceof DateTimeType) {
      value = ((DateTimeType) state).getCalendar().getTime().getTime();
    } else {
      value = state.toString();
    }
    return value;
  }