The energy transition towards renewable sources is gaining momentum globally, with hydropower, wind, and solar energy leading the way. As renewable energy surpasses fossil fuels in power generation, the focus shifts to decarbonizing energy systems. Gas turbines, crucial for grid stability, can now operate on sustainable fuels like hydrogen, biogas, and methane derivates. Major manufacturers are investing in hydrogen-capable turbines by 2030, while projects like HYFLEXPOWER in France demonstrate successful integration. Biogas from organic matter and renewable natural gas offer additional decarbonization options. Synthetic methane, derived from hydrogen and CO2, presents a low-carbon fuel alternative. The shift towards decarbonized gas turbines is vital for a sustainable energy future, offering both operational flexibility and environmental benefits.