Hi there and welcome
You will in no way lose Gmail or have it affected by uninstalling Chrome, they are separate.
You would just go to www.gmail.com within internet explorer and you can then sign in and access your emails there
If you would like any additional information or assistance, please do not hesitate to let me know.
And if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.