You will be eligible to gratuity provided your establishment is covered by Payment of Gratuity Act. Your establishment not being a factory, mine or oil field but a commercial establishment will be covered by the Act provided your establishment has at least 10 employees. Since you have 10 employees working, your establishment is covered and, therefore, you will get gratuity.
Various court judgements show that part time employee should be treated at par with full time employees in respect of all social security benefits. Therefore, status of employees as to full time or part time, monthly paid or daily rated, is immaterial for application of any labour law including Payment of Gratuity Act.
Madhu.T.K