The fault is more with Gmail than it is the T1's browser. Try this:
1. Bring up the browser, press the Options button, click "More", "Windows", then close all open windows.
2. Try the "old" version of Gmail mobile:
https://mail.google.com/mail/u/0/x/pmlttwcnxrkk/r/.
I recommend bookmarking that in your T1's browser.
If you find there's something you can't do in the mobile version, there's a link at the bottom to access the Desktop version of Gmail... though it's not the easiest thing to work with on a 7" screen.