Revenue in the January-March quarter rose to 2.29 trillion roubles from 2.14 trillion a year earlier.
Gazprom is a lynchpin of Russia's commodity-reliant economy with its sales accounting for more than 5 percent of the country's $1.6 trillion annual gross domestic product.
Russian gas exports have been increasingly politicised after Moscow annexed Crimea peninsula from Ukraine in 2014. A wider standoff between Russia and the West has also contributed to Moscow's global energy expansion.
Gazprom's sales to Europe account for around two thirds of its total gas sales. The volumes of gas shipped to Europe declined in the first quarter to 62.4 billion cubic metres (bcm) from 71.5 bcm in January-March 2018, the firm said on Thursday.