If you'd like to analyze test data in other reporting tools, like Google Analytics, segmenting a view for your test is straightforward, and can be performed by targeting the URL(s) for your tested templates and filtering for the query parameter of the variant template.
Using your reporting tool of choice, create a new report or view that is targeted at the URL (or group of URLs) assigned to the template you are testing.
Add a filter for page URL, select "contains" as the operator logic, and enter the view=[template-suffix] URL parameter to filter your report or view to the test variant. If you are unsure of which suffix corresponds to your test, you can look at your test variant in Shoplift. The suffix of the variant will be the variant title in either the Test Draft screen or the Test Report screen.