P​ianist Gemma Webster studied at the Purcell School, the Royal College of Music, University of York, the Royal Northern College of Music and the Sibelius Academy (Finland) with generous scholarships from the Tillett Trust, Musicians' Benevolent Fund, Tunnell Trust, Kendall-Taylor Award (RCM), Favre-Gilly Foundation, Dorothy Grinstead Memorial Fund, and the Else & Leonard Cross Trust (RNCM). 

Gemma has performed as soloist, accompanist and chamber pianist across the U.K. including at the Queen Elizabet​h Hall, St. John's Smith Square, St. Martin-in-the-field's, Buckingham Palace, Ribble Valley International Piano Week, Lancaster International Concert Series, the Universities of Oxford, Cambridge, York and Sheffield, and for BBC television and radio. 

Gemma's teachers included Martin Roscoe, Irina Zaritskaya, Jeremy Young, John York and Sim Yuen.  She participated in masterclasses at IMS Prussia Cove, the Banff Centre Canada (as a Resident Artist) and the Pablo Casals Festival (Prades) with Ferenc Rados, Pav​el Gililov, Itamar Golan, Benjamin Zander, William Fong and Christopher Elton.

Gemma has won many 1st prizes including the RNCM Concerto competition, the National Derby Piano Concerto competition, and the National Toshiba Chamber Music Awards. Overseas concerts have included the Ftan Institut (Switzerland), Utrecht Musikcentrum, Rolston Hall (Canada) and Martinu Hall (Czech Republic).  Gemma has performed Piano Concerti by Chopin, Schumann, Shostakovich, Ravel and Franck in the Netherlands and the U.K. under conductors such as Martyn Brabbins and Darrell Davison.

In chamber music Gemma has collaborated with Steven Isserlis, Ian Clarke, Guy Johnston (BBC Yo​ung Musicians Winner), Jenny King (BBC Symphony Orchestra), David Waterman (Endellion Quartet), Denis Bouriakov (Principal Flute, Los Angeles Symphony Orchestra), Daniel Bates (ROSL Gold Medal), Jonathan Cohen, Naomi Williams (Royal Opera House), Katherine Baker (Principal Flute, Royal Opera House), Ani Kalayjian (Anglo-Czech Competition Strings Winner), Marie Macleod (BBC Young Musicians Strings Winner) and Camarilla Ensemble (ROSL Ensemble Winner).

Gemma has acco​mpanied instrumental masterclasses given by Alexander Baillie (at Bremen Hochschule), David Waterman, Steven Isserlis (at IMS Prussia Cove), Steven Doane (at RCM), Benjamin Zander (Switzerland), Ralph Kirshbaum (at RNCM) and Ian Clarke.

Gemma has taught at the University of Sheffield's Department of Music, Chetham's International Piano Summer School, Christ's Hospital School (H​ead of Piano 2010-2018), Cherry Pie Music, London (Head of Piano 2018-2019) and Westminster School (London). In 2019 Gemma joined the accompaniment team at Chetham's School of Music.