To set up Gmail account on your Samsung Galaxy Tab, read out the instructions written below.
Set up Gmail Account on Samsung Galaxy Tab
Tap on “Applications” from “Home” screen
Then tap on “Email”, on “Set up email” screen, provide username and password of your Gmail account and press “Next”
On next screen you can set two options as “Give this account a name” and set a “display name on outgoing messages” and press “Done”
Your Gmail Inbox will display on Galaxy Tab