I had a similar issue with my DD (although she was FF until 12mths). Actually it was the MCHN who said that as long as everything is in proportion ie: head circum, length & weight then dd is fine. The only issue she did mention is that say dd was in the 70th % and then dropped dramatically to the 25th% - this would be a little cause for concern but would suggest a referal to a pead not just trying to shovel more food in..... Sounds like your dd is offered variety and sufficient meals -
GP is just that a GP.