Grzegorz Gajewski earned his Grandmaster title in 2006, the same year he won the Polish Blitz Chess Championship. He became Polish champion in classical chess in 2015.
In addition to his own playing career, Gajewski is well-regarded as the second coach for acclaimed World Chess Champion Viswanathan Anand, and he also trained top-level chess player Sergey Karjakin. He played a significant role in preparing Anand for his world championship matches in 2008, 2010, and 2012.
Gajewski is also known for his extensive contributions to chess theory, particularly the opening line referred to as the "Gajewski Gambit". This is a variation of the Ruy Lopez opening strategy, typically involving a surprising and aggressive pawn sacrifice to gain an advantageous position.
In terms of his personal life, Gajewski was born in Olsztyn, Poland and later graduated from the Agricultural University of Krakow with a master's degree in economics. He is multilingual, fluent in both English and German.