The 34-year-old has paid tribute to his former club, labelling it as one of the 'highlights' of his career after recently announcing his decision to continue his career in Qatar
The former Real Madrid captain joined the Royal Blues in 2010, ending his 17-year association with the Blancos, and enjoyed further success in Germany, having lifted the DFB-Pokal and Super Cup.
However, Raul chose to end his spell in Gelsenkirchen and instead pen a one-year deal with Qatari side Al Sadd, but he nonetheless reflected on his "outstanding" pair of campaigns with Schalke.
"These two years have been absolutely outstanding. I will never forget this, and I've seen, people will not forget me so fast! I have enjoyed every game, and every trip" he told S04TV.
"I felt really euphoric, because everything worked out so great with my team-mates. Even with the coaches who have given me their trust. Everything was really wonderful.
"In each game, how they [the Schalke fans] live for the club, it's almost like a religion if you want to put it that way. This is really wonderful.
"I want to flatter everyone here. To have played here at S04 is one of the best experiences of my life. For the fans, I have no words to express what they have given me.
I have already said that at the press conference. To give back to them that love, I would [need to] score a lot more goals. I felt at home during those tow years, as it was with Real Madrid over the 17 years."
The 34-year-old, however remained tight-lipped over possibly returning to the German club one day, but maintained his appreciation of the fans' unequivocal support.
He continued: "You never know where fate drives you in life. My family and I have lived here in any case very well.
"Thank you, thank you for your kindness. I wish you all the luck in the world, come what may. I will continue to be a Schalke fan and hope for the greatest success."