The Gers got the better of Old Firm rivals Celtic in the semi-finals of the Scottish Cup at Hampden Park in Glasgow on Sunday afternoon.
The game finished 2-2 after extra time, and Mark Warburton’s side clinched the contest 5-4 on penalties.
Shiels, who has been on the books of Rangers since 2012, believes the win has made it clear to Celtic that the Gers are back.
“It has been a long road and for too long Celtic have looked down on us,” the 31-year-old Northern Ireland international told The Glasgow Evening Times. “Now I think they know that we are coming.”
Rangers have already won the Scottish Championship title and the Scottish Challenge Cup this season.
The Gers will feature in the Scottish Premiership next season, and it is clear that they will be a force to be reckoned with in the top fight of Scottish football.
The Ibrox outfit have not featured in the Scottish top flight since 2012, but it seems that they are ready for the big times.