Gabriela Castro (born 11 July 1966) is an Argentine former professional tennis player.

Castro was a top 100 doubles player and had her most successful period on the WTA Tour when she became the doubles partner of Conchita Martínez in 1989.^[1] The pair were runners-up at the Estoril Open and won two ITF $25,000 titles that year. At the 1990 French Open, Castro and Martínez made the round of 16, beating third seeds and former Wimbledon champions Kathy Jordan and Liz Smylie en route. When Castro retired from the tour in 1990 she became Martínez's coach.

Since 2012, Castro has been a director and coach at CEI Tennis in Buenos Aires. She operates the centre with Spanish former professional player Ana Almansa, who runs the Barcelona venue.^[2]

Result	Date	Tournament	Surface	Partner	Opponents	Score
Loss	17 July 1989	Estoril, Portugal	Clay	Conchita Martínez	Iva Budařová Regina Rajchrtová	2–6, 4–6

Result	No.	Date	Tournament	Surface	Opponent	Score
Loss	1.	29 November 1987	Buenos Aires, Argentina	Clay	Cristina Tessi	3–6, 1–6
Loss	2.	30 May 1988	Adria, Italy	Clay	Inmaculada Varas	5–7, 6–3, 3–6

Result	No.	Date	Tournament	Surface	Partner	Opponents	Score
Loss	1.	24 August 1987	Porto, Portugal	Clay	Ana Segura	Janet Souto Ninoska Souto	6–4, 2–6, 0–6
Win	1.	31 August 1987	Vilamoura, Portugal	Clay	Ana Segura	Sandrine Jaquet Andrea Martinelli	6–2, 6–1
Loss	2.	21 March 1988	Reims, France	Clay	Ana Segura	Luciana Tella Andrea Vieira	3–6, 7–5, 2–6
Loss	3.	4 April 1988	Bari, Italy	Clay	Ana Segura	Michaela Frimmelová Petra Langrová	4–6, 5–7
Loss	4.	15 August 1988	Caltagirone, Italy	Clay	Ana Segura	Janet Souto Titia Wilmink	4–6, 2–6
Win	2.	18 June 1989	Modena, Italy	Clay	Conchita Martínez	Debora Garat Florencia Labat	6–3, 6–2
Win	3.	26 June 1989	Arezzo, Italy	Clay	Conchita Martínez	Anne Grousbeck Ei Iida	w/o

• Gaby Castro at the Women's Tennis Association
• Gaby Castro at the International Tennis Federation