If you have a new computer, there's no need to re-enter your Gmail login details. These details are stored as cookies in your browser. Copy those details by exporting the cookies from your current browser to be imported into the browser on the new computer.
Internet Explorer
Internet Explorer has a built-in cookie import and export feature, making it very simple to move all your cookies, including your Gmail login information, to a new computer. Under the File menu, use the "Import/Export" option to "Export to File." Choose "Cookies," and save the file in a location you can remember. Send the file to your new computer through email or on a USB drive, then repeat the process selecting the "Import File" option to upload your existing cookies to the new computer.
Google Chrome
Unlike Internet Explorer, Chrome doesn't have a native way to export cookies. Download the "Cookie.txt Exporter" extension, which allows you to export cookies from the website your are currently browsing on, such as Gmail. You can then copy those cookies to Chrome on the new computer.
Firefox and Safari
Neither of these browsers has a default cookie-export program. For Firefox, download the "Export Cookies" add-on. For Safari, you need the "Safari Cookies Utility." For both browsers, you must also download the "WGET" application to transfer cookies to the browser on your new computer.
Manually Copy
All browsers save their cookies in a file, although these files have different extensions. Find your browser's cookies file by searching for "cookie" in your hard drive's search field. Email the file or save it to a USB drive, then transfer it to the same file location on your new computer. This transfers all the cookies, not just your Gmail login information, but it doesn't require you to download any add-ons.
Internet Explorer
Internet Explorer has a built-in cookie import and export feature, making it very simple to move all your cookies, including your Gmail login information, to a new computer. Under the File menu, use the "Import/Export" option to "Export to File." Choose "Cookies," and save the file in a location you can remember. Send the file to your new computer through email or on a USB drive, then repeat the process selecting the "Import File" option to upload your existing cookies to the new computer.
Google Chrome
Unlike Internet Explorer, Chrome doesn't have a native way to export cookies. Download the "Cookie.txt Exporter" extension, which allows you to export cookies from the website your are currently browsing on, such as Gmail. You can then copy those cookies to Chrome on the new computer.
Firefox and Safari
Neither of these browsers has a default cookie-export program. For Firefox, download the "Export Cookies" add-on. For Safari, you need the "Safari Cookies Utility." For both browsers, you must also download the "WGET" application to transfer cookies to the browser on your new computer.
Manually Copy
All browsers save their cookies in a file, although these files have different extensions. Find your browser's cookies file by searching for "cookie" in your hard drive's search field. Email the file or save it to a USB drive, then transfer it to the same file location on your new computer. This transfers all the cookies, not just your Gmail login information, but it doesn't require you to download any add-ons.