Gomez has impressed for Liverpool in their 100 per cent start to the season.
But Euell admits he could have been very different for Gomez, revealing to Sky Sports: “Nobody at Charlton could say a bad word about him.
“I remember speaking about it with him and Andre Bikey, who we had in defence at the time, but we didn't need to tell him much because he knew it was down to him to make those decisions.
“He knew he was an asset and the club would probably sell him, but he was saying he didn't want to go to a bigger club after half a season in the Championship and play in their U23s. He felt that wasn't going to help him. He was in a good place playing men's football, so why change?
“The move didn't go through in January in the end, so when he did go to Liverpool in the summer, it went how he had wanted. That's Joe. He was always very thoughtful in terms of his career and what he wanted to do. He was never trying to get ahead of himself."