The 24-year old netted his eighth goal in his last six outings in the 5-0 league win at St Mirren on Saturday and Lennon is hoping he can step up even further against Spanish aces Barcelona at the Nou Camp on Tuesday night.
"We had many brilliant performances against St Mirren but Gary was different class," he said.
"He has so many attributes and I'm running out of things to say about him. He's a great age and probably at his peak.
"His intelligence and all-round play are of a very high quality.
"I hope Gary takes it all with him into Tuesday night against Barcelona and I think he can."