Making his first Premier League start for three months in their 3-1 victory over Bournemouth on Saturday, the 21-year-old showed plenty of industry with little end product.
Guardiola, though, retains confidence in him.
"It's this work ethic he has," the Manchester City manager said. "Always I said to him that when he puts in the work like he does on the pitch, always we will sustain him."
Gabriel said: "I always make it clear for Pep that I'm here to help the team regardless of how."