Gordon's threat to sit out into the regular season and request a trade if a new deal isn't made by Week 1 could be tested, Robinson adds.
The 26-year-old is heading into the last season of his rookie contract on a fifth-year option worth $5.6 million.
The two-time Pro Bowler previously stated his desire to stay in Los Angeles, but only if the two sides reach a respectable agreement.
"Just because we're going through contract issues right now doesn't mean I want to get traded," he said. "I love being a Charger. I don't want them to feel like I don't want to be there."