i have a domain with which i am using gmail professional email services, now i want to transfer this domain to my other go-daddy account.
when i will transfer domain will it effect my emails???
The transfer itself will not affect your email function. Only if and when you change the nameservers on the domain after arrival will the MX records (or email records) be affected. You can easily update those records on the domain once the transfer is completed into your account.
This should help at that time: https://ca.godaddy.com/help/pointing-your-domains-email-service-to-google-7936?