Almeria striker Ortiz is on the verge of completing a move to the Scottish champions and a source close to him told SunSport that ex-'Gers centre-half Cuellar described the club as being like Spanish giants Madrid.
"Carlos phoned Juanma in Glasgow on Tuesday and told him he was thrilled for him that he was joining Rangers," the source revealed.
"They played together at Osasuna and they are good friends."
And Ortiz insists he is keen for the deal to go through as swiftly as possible so he can get on with the next phase of his football career.
"I want this to go through quickly so I can go to Germany. I want to leave with the rest of the lads. I have everything ready to be a Rangers player," he said.