SINGAPORE - The world No. 22, the Republic's top women's singles player, tendered her resignation to the Singapore Badminton Association (SBA) last week and will play no part in the Uber Cup finals in New Delhi later this month.
An SBA statement yesterday cited nagging injuries and a desire to look after her ageing parents as the reasons behind the decision.
Her departure, however, should come as no surprise.
The writing was on the wall as early as January, when the SBA appointed Liu Qingdong as its new head coach, replacing chief singles coach Luan Ching at the helm.
The Straits Times reported then that Gu had submitted a letter to the national governing body and was contemplating quitting.
She has missed training several times since and as noted in the statement yesterday, felt the new coaching set-up is "unable to bring her to the next level".
The 2012 Olympian declined comment when contacted yesterday.
Gu, a Jiangsu native, came to Singapore under the Foreign Talent Scheme in 2003 and left the SBA stables when she hung up her racket in favour of her books in 2008. She later returned near the end of 2009.
She has yet to win a professional title, with a quarter-final appearance at the 2011 All England Championships and a runner-up finish at the third-tier Malaysia Open Grand Prix Gold last year among her more notable achievements.