Alongside head coach Dean Ryan, assistant coach Bryan Redpath and managing director Ken Nottage, they answered questions from a 150-strong audience and displayed images of the new Grandstand development.
"We want a great ground up to modern standards and conditions that must comply to the league," Walkinshaw said.
"We will develop in stages to increase the capacity but we want to keep the atmosphere in place but make it a better environment to watch rugby."
The stadium development dominated the first fans' forum for six years, which was held at The King's School but less than half the venue capacity of 300 season ticket holders attended.
Walkinshaw and Nottage referred to a recent survey of Guinness Premiership supporters, in which Gloucester came out 11th of the 12 clubs for its provision of seating and covered areas before Nottage displayed the first plans for the new Grandstand that will begin in March.
Walkinshaw added: "The whole ground has to be redeveloped. The Main Grandstand is just the first step.
"We've got to get the capacity to 20-25,000 over the next three to five years, so the Shed will be redeveloped in the course of that time but we will do it in stages.
"We're still running the numbers and we will be putting the first attempt at planning in the next two months. It could take years before something happens.
"But the Shed will be coming down. It is nothing special as a structure and we will put something there that will be better - and it can be called the Shed if people want it to be.
"The experience should be better in terms of seeing the game and comfort.
"Ultimately we will have a grandstand on that side of the ground to get the capacity for us to compete with the other top teams. People who watch rugby from the Shed are very fond of it and we can understand that but we have to follow the likes of Leicester and develop and move forward.
"Eventually, we all have to move forward and the Grandstand is the first step on that but the whole thing is a progression."
Walkinshaw confirmed that work on the redevelopment of the main Grandstand is underway with planners and designers. Building work is due to get under way on March 26, following the rearranged Guinness Premiership game against Newcastle, to increase Kingsholm's capacity to around 16,500.
Walkinshaw revealed the likely venue for Gloucester's remaining home game against Bristol on April 28 will be Ashton Gate, with plans in place for any potential play-off fixtures - and confirmed that season ticket holders will be informed as soon as a decision is made.
"There will be a lot of support activity to ensure our fans get there and outnumber anybody else," he said.
"It was between Bristol and Oxford and we decided on Bristol to make it easier for everyone to get to.
"Other games will be played at Kingsholm and we are looking at how to handle the seating for the people who sit in the Grandstand."
Ryan and Redpath also fielded questions on the ground redevelopment as well as playing matters and the pair spoke with conviction and dedication about their future plans.
Ryan said: "I'm in the market place for players and I need to be able to show them good facilities, but I need to know they are coming to Gloucester for the rugby. I may speak to someone who has been at Toulouse one-day and Leicester the next and we need to be able to compete alongside that.
"Having a great stadium and a great team do not go hand-in-hand. We have the starting point with a very good team and we need facilities to match.
"We want Gloucester to be at the forefront of European rugby - on and off the field - to achieve that regularly we need to be in the shake up in the Guinness Premiership regularly and we want to be in the play-offs regularly.
"As a side we are capable of some very good performances and the exposure to the Heineken Cup gives us a better chance of that. We have started to put together a great team and we want to develop that."