Impossible insert data into mysql table with Point data type using Gorm customized data type

In my mysql db I have table "restaurant". This table has field "position" with type POINT. So, when I try to insert data in to table using customized data type like in docs https://gorm.io/docs/create.html#Create-From-SQL-Expr/Context-Valuer and to get inserted id, but I got error:

"sql: converting argument $6 type: unsupported type models.Point, a struct"

I'm new in go and sorry for my English.

Code:

Model

type Restaurant struct {
    ID            uint
    Name          string          `json:"name"`
    EmployeeId    uint            `json:"employee_id"`
    Phone         string          `json:"phone"`
    Address       string          `json:"address"`
    ImagesUrl     *string         `json:"images_url"`
    Position      Point           `json:"position" gorm:"type:Point"`
    WorkDays      string          `json:"work_days"`
    StartWorkTime string          `json:"start_work_time"`
    EndWorkTime   string          `json:"end_work_time"`
    Blocked       bool            `json:"blocked"`
}

Point type

type Point struct {
    LatLong string `json:"lat_long"`
    //Lat float64
    //Long float64
}
func (p *Point) Scan(v interface{}) error {
    fmt.Printf("Scan value %v", v)
    return nil
}

func (p Point) GormDataType() string {
    return "geometry"
}

func (p Point) GormValue(ctx context.Context, db *gorm.DB) clause.Expr {
    return clause.Expr{
        SQL:  "ST_PointFromText(?, 4326)",
        Vars: []interface{}{fmt.Sprintf("POINT(%s)", p.LatLong)},
    }
}

body request data:

{
    "name": "Restaurant 1",
    "employee_id": 9,
    "phone": "123465",
    "address": "Test Address 91",
    "work_days": "sdfsfsd",
    "start_work_time": "00:00:00",
    "end_work_time": "00:00:00",
    "position": {
        "lat_long": "38.590559 68.755866"
    }
}

Calling method after parsing body to Restaurant type

func NewRestaurant(restaurant *Restaurant) (uint, error) {

    err := GetDB().Create(restaurant).Error

    if err != nil {
        return 0, err
    }
    return restaurant.ID, nil
}

dependency

import (
    "gorm.io/driver/mysql"
    "gorm.io/gorm"
)

gorm build this query :

INSERT INTO `restaurant` 
(`name`,`employee_id`,`phone`,`address`,`images_url`,`position`,`work_days`,`start_work_time`,`end_work_time`,`blocked`) 
VALUES 
("Restaurant 1",9,"123465","Test Address 91",NULL,"{38.590559 68.755866}","sdfsfsd","00:00:00","00:00:00",false)