Based on US Government Sites, GNU/Linux Has Reached About 8% "Market Share" in Desktops/Laptops
According to analytics.usa.gov, GNU/Linux has risen to about 5.7% in the past week, with "1.71 billion sessions in the last 30 days". This figure includes mobile platforms such as iOS and Android:
Culled to exclude mobile platforms, GNU/Linux would likely be above 8%. That's roughly the same thing statCounter sees this month in the US. █