Please edit the below snippet to return AddDate value from the table M_CKGrossMotor table in addition with Id, Appointment ID ... and such in response.
Snippet:
@app.route('/viewGrossMotorForm', methods=['GET','POST'])
def viewGrossMotorForm():
    session=Session()
    try:
        if(request.method == "POST"):
            if('Authorization' in request.headers):
                token= request.headers.get('Authorization')

                if not token:
                    return jsonify({'MSG':'Token is missing'})
                data = jwt.decode(token,app.config['SECRET_KEY'], algorithms=['HS256', ])
                if(data):
                    request1= request.get_json()
                    pid = request1.get('pid')
                    
                    queryresult= Common_Function.CommonFun.convertToJson(
                                Constant.constant.constant.viewGrossMotorForm,
                                session.query(Model.models.Application.M_CKGrossmotor.CKGID.label('ID'),
                                            Model.models.Application.M_CKGrossmotor.M_AppointmentID.label('Appointment ID'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor3yes.label('0-3 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor3no.label('grossmotor03no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor6yes.label('3-6 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor6no.label('grossmotor36no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor9yes.label('6-9 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor9no.label('grossmotor69no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor12yes.label('9-12 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor12no.label('grossmotor12no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor18yes.label('12-18 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor18no.label('grossmotor1218no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor24yes.label('18-24 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor24no.label('grossmotor1824no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor30yes.label('24-30 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor30no.label('grossmotor2430no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor36yes.label('30-36 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor36no.label('grossmotor3036no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor42yes.label('36-42 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor42no.label('grossmotor3642no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor48yes.label('42-48 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor48no.label('grossmotor4248no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor54yes.label('48-54 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor54no.label('grossmotor4854no'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor60yes.label('54-60 Months'),
                                            Model.models.Application.M_CKGrossmotor.grossmotor60no.label('grossmotor5460no'),
                                            Model.models.Application.M_CKGrossmotor.AddDate.label('AddDate'),
                                            
                                                ).filter_by(M_Patient_MPID=pid,IsActive=1,IsDeleted=0
                                ).order_by(Model.models.Application.M_CKGrossmotor.CKGID.desc()).all())


                    return jsonify(result=queryresult)
                else:
                    return jsonify({'err':'Token is expired'})
            else:
                return jsonify({'err':'Please Login'})
    except Exception as e:
        return jsonify({'err':str(e)})
    finally:
        session.close()

Response:
{
    "result": [
        {
            "ID": 20,
            "Appointment ID": null,
            "0-3 Months": "0",
            "grossmotor03no": "0",
            "3-6 Months": "3",
            "grossmotor36no": "0",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 19,
            "Appointment ID": null,
            "0-3 Months": "2",
            "grossmotor03no": "1",
            "3-6 Months": "1",
            "grossmotor36no": "2",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 18,
            "Appointment ID": null,
            "0-3 Months": "1",
            "grossmotor03no": "2",
            "3-6 Months": "2",
            "grossmotor36no": "1",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 17,
            "Appointment ID": null,
            "0-3 Months": "2",
            "grossmotor03no": "1",
            "3-6 Months": "2",
            "grossmotor36no": "1",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 16,
            "Appointment ID": null,
            "0-3 Months": "1",
            "grossmotor03no": "2",
            "3-6 Months": "2",
            "grossmotor36no": "1",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 15,
            "Appointment ID": null,
            "0-3 Months": "1",
            "grossmotor03no": "2",
            "3-6 Months": "1",
            "grossmotor36no": "2",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 14,
            "Appointment ID": null,
            "0-3 Months": "1",
            "grossmotor03no": "2",
            "3-6 Months": "1",
            "grossmotor36no": "2",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 13,
            "Appointment ID": null,
            "0-3 Months": "0",
            "grossmotor03no": "0",
            "3-6 Months": "3",
            "grossmotor36no": "0",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 12,
            "Appointment ID": null,
            "0-3 Months": "1",
            "grossmotor03no": "2",
            "3-6 Months": "2",
            "grossmotor36no": "1",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 11,
            "Appointment ID": null,
            "0-3 Months": "1",
            "grossmotor03no": "2",
            "3-6 Months": "2",
            "grossmotor36no": "1",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 10,
            "Appointment ID": null,
            "0-3 Months": "3",
            "grossmotor03no": "0",
            "3-6 Months": "2",
            "grossmotor36no": "1",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 9,
            "Appointment ID": null,
            "0-3 Months": "0",
            "grossmotor03no": "0",
            "3-6 Months": "3",
            "grossmotor36no": "0",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 8,
            "Appointment ID": null,
            "0-3 Months": "0",
            "grossmotor03no": "0",
            "3-6 Months": "3",
            "grossmotor36no": "0",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 7,
            "Appointment ID": null,
            "0-3 Months": "0",
            "grossmotor03no": "0",
            "3-6 Months": "3",
            "grossmotor36no": "0",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 6,
            "Appointment ID": null,
            "0-3 Months": "0",
            "grossmotor03no": "0",
            "3-6 Months": "0",
            "grossmotor36no": "0",
            "6-9 Months": "3",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 5,
            "Appointment ID": null,
            "0-3 Months": "0",
            "grossmotor03no": "0",
            "3-6 Months": "3",
            "grossmotor36no": "0",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 4,
            "Appointment ID": null,
            "0-3 Months": "0",
            "grossmotor03no": "0",
            "3-6 Months": "3",
            "grossmotor36no": "0",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        },
        {
            "ID": 3,
            "Appointment ID": null,
            "0-3 Months": "3",
            "grossmotor03no": "0",
            "3-6 Months": "2",
            "grossmotor36no": "1",
            "6-9 Months": "0",
            "grossmotor69no": "0",
            "9-12 Months": "0",
            "grossmotor12no": "0",
            "12-18 Months": "0",
            "grossmotor1218no": "0",
            "18-24 Months": "0",
            "grossmotor1824no": "0",
            "24-30 Months": "0",
            "grossmotor2430no": "0",
            "30-36 Months": "0",
            "grossmotor3036no": "0",
            "36-42 Months": "0",
            "grossmotor3642no": "0",
            "42-48 Months": "0",
            "grossmotor4248no": "0",
            "48-54 Months": "0",
            "grossmotor4854no": "0",
            "54-60 Months": "0",
            "grossmotor5460no": "0"
        }
    ]
}