The energy transition is rapidly progressing, with renewable energy sources expected to overtake fossil fuels by 2034. While wind and solar power are growing, the intermittent nature of renewables poses challenges for grid stability. Decarbonized gas turbines utilizing sustainable fuels like hydrogen are seen as crucial for meeting energy demands. The article highlights the importance of decarbonization in combating the climate crisis and outlines two main routes: sustainable fuels or carbon capture technologies. Notably, hydrogen emerges as a headline contender, with gas turbine manufacturers aiming for 100% hydrogen capability by 2030. The HYFLEXPOWER project in Saillat-sur-Vienne, France, showcases the potential of hydrogen in a power-to-energy system, proving effective in handling hydrogen combustion. Additionally, biogas, RNG, synthetic methane, and methanol offer renewable fuel options for decarbonizing gas turbines, with successful tests demonstrating emissions reductions and energy efficiency. Ammonia is also explored as a potential fuel alternative. Overall, the article emphasizes the shift towards sustainable energy sources and the innovation in decarbonizing gas turbines to pave the way for a greener future.