If you often use the same Gmail template/layout try adding the Google Lab feature called "Canned Response." This will allow you to save the email format and use it again and again.
Creation of Canned Response Template
1) In Gmail >Settings (Top Right Hand Corner)>Labs>Canned Responses [Select Enable] >Save
Using a Canned Response Template
1) Compose Gmail
2) Select Canned Response
3) Select Title of Canned Response under Insert
4) Edit body of Gmail as needed