Now the 29-year-old has agreed to return to return to the Welsh capital at the end of the current campaign and Wilson believes it is an important signing for his side.
"We are thrilled to sign Rhys Gill and that an ex-Cardiff Blues player is now coming home to his region," he told the club website.
"He has had a very successful six years at Saracens where he has won trophies and experienced being part of one of the top environments in English rugby.
"Rhys has been a regular in the Saracens squad and he will bring a lot to us, both inside and outside of the set piece."
Between now and the summer, Gill has aspirations to add to his trophy cabinet but the loosehead is already casting his mind forward to next term.
He began his professional career in Cardiff and now Gill is looking forward to his homecoming with the Blues.
"It's exciting to be coming back home for a new challenge in my career," he said.
"I also have strong Wales ambitions that I want to fulfil and I feel playing well for Cardiff Blues can help me achieve that aim.
"I've been lucky enough to see Cardiff Blues play firsthand this season and they're already a different side to the team that started the season. It's exciting to see the plans for the future."
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