City Manager Paul Groves was "delighted" as he watched his side secure a 4-0 win against title favourites York City in front of a bumper crowd.
Groves said that players have been working hard since pre-season started to produce performances like this, though he urged caution on reading into the result.
"It's a marathon not a sprint," he said. "It's a long, long season ahead for us and although it's a decent start, this is just one game on the road. We're still building, there's a long way to go and we need to keep building on our fitness levels, our performances and one or two other things."
City scored four goals, including the opener from local boy Danny King, a cross-cum-shot from Matt McClure and a 35 yard effort from captain Kevin Dawson.
"It's difficult to pick out the best, there were some good goals. I was pleased for Danny, it's only his second start and he's scored the opening goal and he's showing us some good versatility," said Groves.
Although there were a number of star individual performers from players like Fabien Robert and Man of the Match Kevin Dawson, Groves was keen to emphasise that it was a good all round performance.
"Although those individuals performed well, I think as the Manager you look at other aspects of our game. We're perhaps not quite as strong in certain areas, but we dealt with those areas well today. But those individuals have done well for the team, and the team have given them the platform to produce performances like they have. It's a collective performance."
The attendance of 2,034 made it the highest watched home league game for City since 1996 against rivals Cheltenham Town.
"I'm delighted for the fans that have been able to come, watch four goals, watch a decent performance and to have them back in was tremendous. You can see a measurable difference in the players performances, and they really got behind the players today, so thank you."
City take on Kettering Town in the Vanarama National League North on the August Bank Holiday Monday. Tickets are available from GloucesterSport.com/tickets.