According to Scottish newspaper the Daily Record: 'Barcelona and Bayern Munich have joined the top clubs in England in running the rule over Rangers starlet Billy Gilmour.
English Premier League sides Manchester United, Manchester City, Arsenal and Chelsea have all previously been linked with an interest.
But now Barça`s top scouts have been to Scotland on several occasions to watch Gilmour, including watching him play for Scotland under-16s.
"Barcelona came to watch just Billy in the game against France and see him as a player in the Xavi or Iniesta mould in terms of his size and technical ability.
"It`s going to be very difficult for Rangers to hold onto him beyond the end of the season, when he turns 16. The top sides from abroad can offer money beyond the reach of Rangers and Celtic." one source told the Daily Record.
If Barcelona were to bid to sign him once he turns 16, Rangers could receive just £100,000 in compensation.
Barcelona are said to also be interested in Celtic`s 13-year-old Karamoko Dembele but will wait until he turns 16 to make an approach.
Barça were reportedly interested in bringing him to Camp Nou 12 months ago, but FIFA regulations prevented such a move.
